The Grainger 13/16" Threaded Shank Drill Bit is made of high speed steel and has a black oxide finish. It has a straight shank with a 1/2" diameter and 13/16" cutting diameter. The drill bit has a 118 degree point angle and is designed for use on steel, cast iron, aluminum, wood, and plastics. It can be used in hand drills, drill presses, and lathes. The drill bit features a threaded shank that provides a more secure connection to the drill chuck.