Unlike conventional twist bits, which have a flat end, the Wood-Spur bit has a pointed end, just like a spade bit. Wood-Spur Bit: Also known as Brad Point Bit, is a type of twist bit that is primarily used with wood.The point end centers the bit for the hole and the paddle shape part will follow to make a wider diameter. Spade Bit: This bit has a flat square shape with a point on the end to make wider holes particularly in wood.

Coming to sizes, twist bits are available from 1/16 inch to 1/2 inch. These bits come in almost all drill bits kits and you can use them to make holes in wood, metal, plastic, etc. Twist Bit: This is perhaps the largest produced drill bit today.Types of Drill Bitsīefore diving into Drill Sizes and Drill Bit Size Chart, let us quickly take a look at some of the popular types of drill bits. Depending on the type of material we are working on i.e., wood, metal, masonry etc., there are different type of drill bits. Speaking of chuck, it has two parts: metal jaws that hold shank of a drill bit and a plastic part that rotates to tighten or loosen the jaws.Īpart from these, a drill also has a forward/reverse switch, a torque collar to manually adjust the torque.Ĭoming to the Drill Bits, they are the main rotating parts that make the holes in wood (or other materials). A drill usually has a handle with good grip to hold the drill, a rechargeable and removable battery, a trigger switch and a chuck. The following image shows a typical cordless electric drill along with all its important parts. Cordless Electric Drills are becoming extremely popular in both the DIY community as well as with the professional usage. The main job of a drill is to make holes in wood, metal, masonry and other materials. Drill Size Chart – Wire Gauge and LetterĪn electric drill is perhaps the most common and frequently used power tool.

Drill bit size chart