What is drill bit ?
Drill bit is cutting tools used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits are come in many sizes and shapes and can create different kinds of holes in many different materials.
Materials used to make drill bits:
1.Carbon Steel
2.High Speed Steel (HSS)
3.Cobalt Steel
4.Tungsten Carbide
5.Polycrystalline Diamond