This drill bit is made of high speed steel and has a 3/16 inch diameter, 1 13/64 inch long shank. It is designed for general purpose use, including light gauge metal, plastics, steel, wood. This jobber length drill bit has a black oxide finish, and has fractional inch measurements. It is non-coolant through with a 3½ inch length. Plus it has 2 19/64 inch spiral flutes, a straight shank, and a 135 Degrees split point.