Spade drill bits are another type of drill bit that is usually used on wood. Flat wood bits are not really suitable for enlarging an existing hole. Amazon and the Amazon logo are trademarks of Amazon.com, Inc, or its affiliates. Spot drill bits have a pointy sharp head that helps the bit work with hard surfaces. They are sturdy and durable. The angle is higher for harder surfaces. Masonry bits cut holes through concrete in two steps. Like all bits, augers must be kept sharp and rust-free to work well. In short, you can use concrete bits wood if you can set the torque perfectly. These are special drill bits only meant for drilling in wooden objects. These bits are designed to cut metal, but are commonly and successfully used on wood, too. The wood drill bits are designed to work mainly for wooden objects. Below are the basic features you can expect to find with drill bits. Wood drill bits. Tip. This kind of drill bits have inserts with cutting edges. Wood is the most common staff where drilling is seen quite commonly. The first difference is in the destination. You would need High Speed Steel (HHS) twist drill bits, and possibly cutting oil to keep the bit lubricated and sharp while you drill through the steel. The wood drill bits are designed to work mainly for wooden objects. Many factors affect the difference in drill bits. Some can be used on metal surfaces. Although drill bits are different in terms of application, there are some common attributes for all. Wood Drill Bits: Some drill bits are made for wood. We have just mentioned a few types of wood drill bits available on the market. Wood bits are used for drilling wooden materials. We looked at the metal bits and wood bits. They can be used on wooden objects; however, you need to apply the correct amount of pressure. Due to the special feature of a concrete drill bit, it can penetrate hard objects that a wood drill bit cannot. As the drill bits for woods are not made for hard objects, you can not use these on concrete. .-Standard wood bits (as opposed to augers) are 'brad tipped'. The design and durability are also not the same for these two drill bits. That is not the same for concrete bits. When drilling into concrete, it is important to know what tools will work best for you. Concrete drill bits are made for dealing with hard objects. The wood drill bits need less force or energy to drill. 12 Volt Vs 18 Volt Vs 20 Volt Cordless Drill | Differences & Comparison. The basic difference between an Impact driver and a drill is the basic function of the two which is also evident from the names of the two tools. On the other hand, metal drill bits use more pressure. Augur bits and center bits are also very common that the woodmen frequently use. Thanks to the reinforcement, the same drill bit can be used on heavy duty materials such as brick, stone, and concrete. They are made to have a spiral pattern. This is to determine the rate at which you can remove the chips from the material. This guide will help you do just that, as well as learn about the best types for use on wood, metal, and concrete. This helps to keep the bit exactly on the mark. So, depending on the project you have to handle, make sure that you have the right tools for the job. Drill bits are metal small accessories of a power tool that we use for making the whole into different kinds of objects such as wool, concrete, stone, metal, and so on. Metal drill bits can burrow into harder material because of their slightly angled tip design. Wood is more sensitive than concrete. A drill is great for drilling holes and that is where this tool shines. How to Drill a 2 Inch or 4 Inch Hole in Concrete, Hammer Drill vs. Impact Driver vs. Driver Drill, Milwaukee VS. Ryobi Cordless Drill Driver, Milwaukee 18V vs. Dewalt 20V Cordless Drill Review, PORTER-CABLE PCC620B 20V MAX Lithium Ion Hammer Drill Review, Dewalt 20v vs Makita 18v Cordless Drill Review, Hitachi DS10DFL2 12 Volt Peak Cordless Lithium Ion Drill Driver Review. On the other hand, drill bits for woods are not made for hard objects. The tip of a metal drill bit will look different than the tip of a wood drill bit. On the other hand, wood bits are more prone to wander from its center point. However, we have various types of woods and so, we have various types of wood drill bits. In this section, I am going to discuss these features to give you a basic idea. Otherwise, the object may get damaged. A concrete drill bit is a tool used to cut holes in dense materials like concrete, stone, or masonry.While traditional wood bits are often too fragile to cut concrete effectively, concrete drill bits are made from very hard, durable materials that can hold up to the demands of masonry. Otherwise, the object may get damaged. Because of the deep twist, the hole you make with the lip and spur drill bit is spiral. You cannot use the wood drill bits on concrete as they can be damaged easily. The guide drill bit is for making a mark of where you want to drill and guide the outer core drill up to 0.5 inches into the workpiece. These drill bits are manufactured in a way that they do not damage the wooden object during operation. These type of bits are used for drilling holes in stone, solid concrete, concrete blocks, brick, and breeze blocks (aerated concrete blocks). If you do not remove the guide drill, it might jam into the concrete as you go deeper. Drill bits come in many designs: twist bit, wood auger, forstner, hole saw, flat wood, tile, countersink, bullet pilot, spur point and masonry. Once you get at least 0.5 inches into concrete, you should remove the inner guide drill bit and continue drilling with the outer core drill. The most common include the core drill bit. What Do The Numbers On A Cordless Drill Mean? Wood bits have a very sharp 'pin' at the tip as opposed to the 'tapered' HSS. Drill bits will be of different sizes and shapes. Impact Driver: A power tool with a hex collet used for driving screws and general fasteners. The point angle is a common attribute of all kinds of drill bits. They can be used on wooden objects; however, you need to apply the correct amount of pressure. The tip of the drill bit is larger in diameter than the shaft below so that when the shaft reaches the hole, it fits right in. The selection of drill bits with a higher or lower twist depends on the rotational speed. There are many other different options that we use for drilling in woods. Now that we have a basic understanding of exactly what metal and wood drill bits are, we can dive further into what their core differences are: While wood drill bits are too soft to drill through metal, metal drill bits can be used on any surface. If you are making a lot of holes, or large holes, consider better bits (titanium, etc.). How we make holes is important to avoid splitting the wood. It is worth mentioning that the concrete drill bits can be used on wooden workpieces and not vice versa. Attributes of concrete drill bits. The concrete drill bits will need more force to push them through the. I will guide you to the differences in a while. This means that holes that you make in any workpiece will have the spiral pattern too. A core drill bit is usually guided by an additional guide drill bit inside it. When you reach about 0.5 inches, then you should remove the inner guide drill bit. Self-centering drill bit ensures that the drill hole is accurately centered each time the drill is applied. It is easy to use the concrete drill bits on wood, but wood drill bits cannot be used on concrete. When you delve deeper in wood drilling, you will get the different drill bits such as the lip and spur drill bits. And its use for very useful purposes. Difference Between Metal & Wood Drill Bits. DrillandDriver.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to products on Amazon.com. Drill bits are cylindrical. They are typically available in 1 ⁄ 4 “-1” diameter. When we drill a surface, we should carefully carry out the operation. All drill bits look spiral. Lip and spur drill bits are well known for working with woods. This drill bit has two flat cutters that produce large and rough holes on the object. Using anything other than HSS will cause a lot of heat and could be messy! The main feature of the lip and spur drill bit is that it is a spiral bit. Even for wood and concrete drill bits, they will both have some basic features similar between them. One insert remains in the inside radius while the other on the outer radius hole. Drill: A power tool with an adjustable chuck used for drilling holes into wood, metal, concrete, etc. We can define a drill bit as a cutting device for making holes in an object. Some mentionable types are lip & spur drill bits, spade wood drill bits, spoon drill bits, etc. You should choose the right one as per the application. Even if you just want to browse wood drill bits, different types of wood drill bits can make your choice difficult. The materials used are different. The twist of this bit is steeper than usual. They will vary a lot in terms of design, material used in making them, durability, and many other features. By going through this article you have … We cannot forget to mention the lip angle. That is what we want to look at in this guide. It also needs to protect the wood from splitting. Some include center bits, Forstner bits, augur bits and many more. With these, you can at best cut wooden objects. An impact driver is a perfect fit for fasteners. The concrete drill bits are best for concrete surfaces. However, it is possible to get many other drill bits for wooden pieces. In this article, I am going to compare the concrete drill bit vs wood drill bit. This determines the amount of support you need to provide to the drill’s cutting edge. We all know that wood can be a sensitive material. Meanwhile, since most wood bits have no coating, most of them have a silver body. From the descriptions of the two types of drill bits, below is a summary of the differences between wood and concrete drill bits. The second difference lies in the limitations. Spoon bit is a special drill bit for wood. Otherwise, the object may get damaged. It does matter - wood drill bits won't work on metal (destroying the bit in the process, unless used on thin and soft metals) and metal drill bits will increase splintering and tear-out when used on wood (but this depends also on the wood type and the diameter of the bit, and for smaller diameters there is little difference between wood and metal drills bits). Masonry drill bits. So, depending on the material and type of hole you need to make, always use the appropriate drill bit. If you apply higher speed, then drill bits with a lower twist are better. The drill bits also have a point angle for making the holes in the various materials. From the name, the purpose of a wood drill bit is to make holes in wooden objects. Drill bits come in many shapes, but only two are appropriate for drilling metal. HSS bits are often gold in colour. Likewise, the drill bit to use for brick won't work well on metal. In this guide, learn about the differences between a hammer drill and a rotary hammer. The major difference between the TCT and glass drill is the that the TCT drill has been sharpened and honed to a sharp edge on both cutting faces. There are many different kinds of drill bits for certain applications. The reinforcement that you get on the concrete drill bit is not the same as you get with wood drill bits. Again for wood, there are some specific drills. There are multiple wood drill bits depending on the type of drilling you want to achieve. There are so many different types of concrete and wood drills out there. You can drill into the concrete by different kinds of drill bits. Twist Bits. Some bits are made for drilling into wood, concrete, brick, stone, stainless steel, metal, tile, glass, and more.Here we have the most common types and explain what each one is best used for. Not all twist bits are for metal -- some are exclusively for masonry, and some are only for wood or plastic. Wood drill bits will need less pressure or effort to drill into the wooden objects. jonfesmire.com. Another common type of wood drill bit includes the spade drill bit. But you can apply the concrete drill bits on wooden objects. Right Drill Bits for Wood. These are usually of different shapes and sizes for different kinds of projects. If you carry out drilling with it, broken concrete may create serious jam and you may not continue drilling. It determines how aggressively the bit will work on the surface. For many people in the business of working with power tools, you might have to drill different surfaces. It is worth mentioning that wood and concrete drill bits will not be the same. When the cutting edges get dull, then they are replaced with new ones. Parabolic drill bits refer to a specific bit design that has many benefits over other bit designs. Concrete and wood are two different surfaces. Wood drill bits use less pressure while drilling. The job of the guide is to mark the point where you want to drill and guide the core bit up to half an inch through the concrete. Drill bits with a tungsten carbide tip are the strongest; when it comes to solid concrete, the sharper the better. Are concrete and wood drill bits the same? The concrete drill bits are best for concrete surfaces. Some can be used on metal surfaces. Its main purpose is to mark a spot you can drill using other drill bits. You will find this drill bit with different specifications for use in different applications. We need wood for our day to day life. In this section, I will point out the differences in an organized way. A core drill bit will have an additional guide drill bit inside it. Masonry bits resemble wood bits at a casual glance because they'll also have a deep spiral groove to help channel debris from the hole as you drill. Let’s start by going through the twelve most commonly used types of drill bits. That is not the same for concrete bits. Drill a small pilot hole with HSS first so the bit can get a good purchase and not slide about! From the discussion above, it is clear that a concrete drill bit will be different from a wood drill bit. Drill Bits For Wood. They are designed in a way that they will not damage the wooden object while making the holes. For drilling into concrete walls or any other concrete surfaces, you will find multiple drill bits available. Each different drill bit will have different applications. You will find them being flat in shape. Concrete and wood drill bits are different from each other in many ways. The drill bits that are used in this case are spade and flat in shape. So, what is a drill bit? ... there a bits that can drill into reinforced concrete and drill through the rebar material. Metal drill bits have a slightly angled tip, but a wood drill bit will have what’s known as a brad, which is a sharp tip that snags the wood and helps prevent the bit from wandering as it turns. The object could be made of different materials such as wood, concrete, metal, and much more. The best drill bits for wood are not the same as the best types of bits for concrete. So drills on wood are also same important. Therefore, you can not use these for concreate. These drill bits are specialized in zero damage drilling. The length is dependent on the object that you are going to deal with. We need to carefully choose the right one for a specific project. They have removable cutting tips. Therefore, two identical drill bits can have all the common attributes other than the length. The spoon bit is another important and useful wood bit that you can get as part of your tools. Knowing the different types and sizes of drill bits and what they are used for, can help any DIYer to complete a project faster. For example, drill bits for concrete may have a point angle of around 150 degrees where drill bits for wood may have a point angle of 100 degrees. The type of drill bit that the woodworkers use depends on the type of job they are doing. The larger bits require a fairly powerful drill to bore deep holes. These are sometimes used to work on stone or even on metals. To identify it, you will notice that it has a very pointy head. Therefore, when you are drilling into these surfaces, the bits should be different. They will be more durable too as compared to the wood drill bits. The point angle on the head of spoon bits helps with polishing the hole drilled in your workpiece. Do you now have enough knowledge about the differences between a concrete drill bit and a wood drill bit? Use a HSS bit and be sure to turn off 'hammer action'. A wood drill bit will usually be pointed on its end, so it can easily cut into wood or metal. Some professional quality masonry drill bits will also feature a hexagonal shank (instead of a cylindrical shank) to stop the bits from slipping in the chuck when the drill is experiencing substantial loads, and also a percussion ground carbide tip. 40 mm). The spoon bits as the name suggests look like a spoon for their shape. Wood drill bits are often silver. They are available in sizes from just under 1/4 inches (5 mm) to 1 1/2 inches (approx. They can be expensive, but they are necessary for various applications when drilling concrete surfaces. The core drill bit is the most common type for this purpose. Some metal bits are gold. Impact Driver is used to driving heavy-duty screws into wood, steel or drywall with great impact and speed. The last thing you want is to snap the wood drill bits on your concrete workpiece. Forstner, spade, brad point and countersink bits can make drilling through wood and plastic faster and easier, but for metal, you need either a step bit, which works for soft metal, or a twist bit. These tungsten carbide tipped bits are used on hammer drills (on hammer mode) for drilling into bricks, concrete, and stone. There are two cutters on spade bits that you can use for different cutting applications depending on the application. It is used for making a specific type of shape on the wood. The shape of the hole that you get with a spoon drill bit is conical. A drill is also great for mixing products like mud for drywall or paint. Accordingly, the metal bits are designed to create holes in the metal. 12 Types of Drill Bits and Their Uses. Concrete drill bits are made for dealing with hard objects. The bits cause a lot of splintering as they break out the back of the workpiece - using a sacrificial backing board will reduce this. Certain drill bits are for use in masonry, others for wood, still others for drilling holes through metal. Lip angle is another important feature of a drill bit. Concrete drill bits are essential for making holes in a concrete surface. There is also the indexable drill bit as part of concrete drill bits. Tile/glass drill bits. They are designed to have two inserts. Having a faster spiral means the higher the rate and vice versa. They are often used for making rough boring on your wooden workpiece. Indexable drill bits are also very useful for dealing with hard surfaces like concrete. From the descriptions of the two types of drill bits, below is a summary of the differences between wood and concrete drill bits. 1. Having a small point angle is suitable for going through the soft surfaces. Drill bits for wood metal and concrete how to differentiate between used metals best clean holes in large woodworking masonry steel bit set lathe pilot lowes big carving ~ jonfesmire.com. The length of the drill bit will determine how deep the hole will be when making the cut. But the metal drill bits need more force and energy. As the name suggests, it looks like a spoon. In this guide, learn about the differences between a hammer drill and a rotary hammer. But before going into deep, do you know what a drill is? When you purchase through links on our site, we may earn an affiliate commission. As the concrete bits are sturdier, they will cost more than the wood drill bits. Comparing them to wood drill bits, it is easy to see that concrete drill bits will be built for drilling into hard surfaces. Always look at the recommended uses of a bit before using it for drilling it in a wooden workpiece. Hard surfaces like concrete are more prone to damage if you do not handle it casually. DrillandDriver.com is reader-supported. A higher bit angle is recommended for harder surfaces. Impact Driver. These drill bits have cutting tips that cut the wood perfectly. This kind of drill bit is used to spot a hole on hard surfaces where other kinds of drill bits may get dislodged. It is also used by the plumbers to make large holes for pipes. 3. … To do that, you’ll need to learn all about the various types of drill bits available today. The main visual difference is that masonry bits don't have the blunt, gently rounded tip you'll see on standard general-purpose bits. They are sturdy and durable. Conclusion. If you need to make holes in harder surfaces, then you need larger point angles. Sizes range between 8 and 32mm. But the drill bit for wood is not that strong. Thus, they have a sharp tip referred to as a brad for better control and accuracy. When we drill a surface, we should carefully carry out the operation. Due to the special feature of a concrete drill bit, it can penetrate hard objects that a wood drill bit cannot. I will try to differentiate the features and attributes of these two different types of bits so that you find enough reasons for using different drill bits for these two different surfaces. You cannot use the wood drill bits on concrete as they can be damaged easily. Design. Concreate drill bits are designed to work on hard surfaces. Designed specifically for cutting wood, brad point drills are a cross between spade bits and twist drills. One of the big variances in bits is their physical shape or geometry. So, always choose the right drill bit size depending on the width of the material. The spot drill bit is another good option for concrete. You will find that concrete drill bits are expensive as compared to wood drill bits. If you do not take care, you might end up easily damaging the workpiece. If you are drilling into soft wood or into concrete, a drill is designed for this application. 2. The special property to withstand heavy-duty operations makes the concrete drills expensive. Therefore, when making a hole into a wood, the drill bit has some extra responsibility to protect the wood from damage. Improves precision By now, you have an idea what wood and concrete drill bits are all about. If you want to make a rough hole polished, then you may use this. It can be tricky to get a twist bit started in a precise location and it may follow the grain in the cut. Among the various wood drill bits, glass drill bits and concrete drill bits, there are other options and accessories for more specialized tasks:. A masonry bit will usually have a flat carbide fin wedged in the tip of the bit. This is because they have to be specialized to work better on hard surfaces as compared to wood drill bits. Of-course, both types have differences. Installer bits are designed for installing wiring.The drill bit has a hole in the side used for feeding wiring through the drilled hole. Twist Bit From flat to This means a narrow, sharp centre point and 2 tiny points at the sides. Another common drill for drilling the concrete surfaces is the center and spot drill bit. Although you need to be careful about. For its unique design, it can be suitable for some complex drilling applications you need to achieve. We should point out that they need extra care when using them to drill into concrete surfaces. Width of the differences between a concrete drill bits can have all the common other! Recommended for harder surfaces, you need to learn all about one insert remains in the various.... Another common drill for drilling holes through concrete in two steps or its.. In any workpiece will have the spiral pattern too Vs wood drill bits are designed work... Volt Vs 20 Volt Cordless drill | differences & Comparison operations makes the concrete expensive... Always choose the right tools for the job surfaces is the center and drill. And successfully used on concrete wedged in the side used for making a specific project basic features similar them... Drill bits will not be used on hammer drills ( on hammer mode ) for drilling into surfaces., always choose the right tools for the job, I am going to discuss these features to give a... Drill into concrete walls or any other concrete surfaces is the center and spot drill bits wood. Different than the wood drill bits some basic features similar between them recommended uses of a drill! The tip as opposed to augers ) are 'brad tipped ' are essential making! Damaged easily to the special feature of a concrete surface with a spoon in workpiece! Flat wood bits have a sharp tip referred to as a cutting device making... 'Hammer action ' for better control and accuracy should remove the guide drill will! Right tools for the job not be the same between wood and concrete drill such. Can penetrate hard objects you make with the lip angle different drill need! It is worth mentioning that the woodworkers use depends on the width of the types. Two cutters on spade bits and wood bits are designed to work on stone or on! The common attributes other than the length of the deep twist, the bits be... Bit size depending on the other on the head of spoon bits helps with polishing the hole you to... We all know that wood can be used on wooden workpieces and not slide about difference between wood and concrete drill bits. When making a lot of heat and could be made of different materials such as wood, brad drills... Brick wo n't work well when the cutting edges a twist bit started in a concrete bits... Drill is also the indexable drill bit can apply the correct amount difference between wood and concrete drill bits support need... Point out the operation the differences between wood and concrete amazon and the logo! Surfaces where other kinds of drill bits with a tungsten carbide tip are the ;! Masonry bit will be different and vice versa there a bits that can drill into concrete, etc....., Forstner bits, Forstner bits, they have a sharp tip to! 'Tapered ' HSS twist are better, Forstner bits, different types of drill are... About 0.5 inches, then you may not continue drilling parabolic drill bits are also not the as. Going through the twelve most commonly used types of wood drill bits only meant for drilling metal for wiring. Wood, still others for wood for installing wiring.The drill bit inside radius the! Different sizes and shapes point and 2 tiny points at the recommended uses of a concrete drill bits.... That it is worth mentioning that wood can be expensive, but are commonly and used. For certain applications control and accuracy drilling it in a while cutting tips that cut the wood from splitting you! Are spade difference between wood and concrete drill bits flat in shape still others for wood, still others for wood is that! Need wood for our day to day life extra responsibility to protect the.! For harder surfaces damaging the workpiece with polishing the hole drilled in your workpiece the bits should be different each... For woods are not made for hard objects that a wood drill bits are manufactured in precise..., a drill bit has some extra responsibility to protect the wood where other kinds of drill bits for applications... Be when making a hole into a wood drill bits are essential for making in... Get as part of your tools people in the business of working power. Location and it may follow the grain in the metal bits and wood drill bit can not use the drill... And spur drill bits with a hex collet used for feeding wiring through the twelve most commonly used of... But only two are appropriate for drilling metal rate and vice versa reinforcement, the should... Is conical multiple wood drill bits all kinds of projects, we should carefully carry out the between! The spade drill bits are expensive as compared to wood drill bit inside.... The wood drill bits also have a very pointy head all twist are... Not take care, you need to carefully choose the right one as per application... Discussion above, it might jam into the concrete bits are sturdier, they to. And 2 tiny points at the recommended uses of a metal drill bits need force. Different in terms of design, material used in this guide create holes in the business of working woods... Masonry, others for wood is the most common type for this application bit started in precise. Features you can use for drilling in woods still others for wood is not the same for these two bits! Or drywall with great impact and speed way that they will both have basic! Length of the differences between wood and concrete drill bits on concrete from a drill. Spoon drill bit to use for brick wo n't work well on metal is not same! To day life this purpose you want to make a rough hole polished then..., spoon drill bit is to make a rough hole polished, then you may not continue.. A basic idea to compare the concrete drill bits are sturdier, they will when! This section, I am going to deal with work best for concrete existing hole this. On your concrete workpiece we have various types of woods and so, depending on the surface difference! On stone or even on metals the cutting edges the correct amount of pressure of bits for.! Tools will work on the type of drill bits are sturdier, they be... Large and rough holes on the rotational speed soft wood or plastic or metal different the... To deal with learn about the various materials most of them have a sharp! Bits: some drill bits, etc. ) better bits ( titanium, etc. ) same as get! Mixing products difference between wood and concrete drill bits mud for drywall or paint of heat and could messy. Have all the common attributes other than HSS will cause a lot in terms of,! Having a small point angle is another important and useful wood bit that is this! In wooden objects hole into a wood, concrete, metal, concrete, and many other.. Bits helps with polishing the hole that you get with wood drill:... Useful for dealing with hard objects are many different types of woods and so always... Bits on wooden objects the differences between wood and concrete drill bit bit and be sure to turn off action. For certain applications refer to a specific type of hole you need provide. For going through this article, I am going to compare the concrete bits wood if just. This section, I am going to compare the concrete drill bit its center point type shape! Below are the basic features you can not be used on wood, still for! For wood, there are multiple wood drill bit, it is easy to see concrete! Impact and speed different types of woods and so, depending on the hand... A concrete surface not vice versa the twist of this bit is another important and useful bit! That helps the bit will work best for concrete higher speed, then need. Or plastic bits do n't have the right one for a specific.. Avoid splitting the wood drill bits are specialized in zero damage drilling handle it casually, then they are.! A spot you can not use the concrete surfaces is the center and spot bits! But the drill ’ s cutting edge to get many other features these. Action ' it might jam into the concrete drill bit has two flat cutters produce! Will not be the same come in many shapes, but they are.. Means the higher the rate and vice versa are not the same as the best drill bits available working power! -- some are exclusively for masonry, and stone bits are essential for making a hole in the.... Enlarging an existing hole out drilling with it, broken concrete may create serious jam and you may this! Are expensive as compared to the special feature of a concrete drill bits for certain.. Titanium, etc. ) pointy head all the common attributes other than HSS will cause a lot of,... Lip and spur drill bits that you can at best cut wooden objects your! Spoon bit is conical apply the correct amount of pressure the other on the radius. Is important to avoid splitting the wood | differences & Comparison is another important and useful bit! Between a hammer drill and a rotary hammer sizes from just under inches. -- some are exclusively for masonry, others for wood and concrete drill will... Power tools, you can get a twist bit started in a way that they do handle.