Any other style of cutter, for example a spade drill, that is rotated and fed in a similar manner as a twist drill to of cut a hole in metal, wood or other materials
A helically grooved steel tool used to cut holes Bits are generally used in a hand brace, lathe, press, or flexible shaft Drop hammer A large hydraulically, electrically, or pneumatically powered hammer used in blacksmithing or to exert great force against dies to create specific shapes
The part of the drilling tool that actually cuts through the rock Drill bits bore a hole into soil, sand or rock by a combination of crushing and shearing actions Drill bits used for extra-hard rock are studded with thousands of tiny industrial diamonds, the hardest substances known