This general purpose jobber length drill bit is made of cobalt alloy steel and has a 3/16 inch diameter shank. It is not rated for any standards. This jobber length drill bit has a black oxide finish, and has wire measurements. It is non-coolant through with a 3½ inch length. Plus it has 1 45/64 inch spiral flutes, a straight shank, and a 135 Degrees split point.