The Grainger 10-16 x 1-1/2 in. Threaded Shank Drill Bit is a high-speed steel bit with a 1/2 in.-20 threaded shank. It has a 118 degree split point tip for fast, accurate starts without walking. The bit is designed for use in metalworking applications like drilling holes in steel, iron, aluminum and other metals. It has a bright finish for increased visibility. Overall length is 1-1/2 in. and shank diameter is 1/2 in. This USA-made drill bit is ideal for production shops, metal fabricators, machine shops, maintenance crews and other industrial users.