drill bit that bores holes in wood or other materials while carrying cuttings away from the bored hole.

auger bit (Wikipedia)

Drill bits are cutting tools used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create different kinds of holes in many different materials. In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck.

From top: Spade, brad point, masonry, and twist drills bits
Drill bit (upper left), mounted on a pistol-grip electric drill
A set of masonry drills

Drills come in standardized drill bit sizes. A comprehensive drill bit and tap size chart lists metric and imperial sized drills alongside the required screw tap sizes. There are also certain specialized drill bits that can create holes with a non-circular cross-section.

« Back to Glossary Index