The Grainger Approved Square End Mill Single End Carbide is a milling cutter with a square end for machining flat surfaces, slots, and shoulders. It has four flutes and is made of solid carbide for wear resistance and hardness. The overall length is 3", diameter is 1/2", and shank diameter is 1/2". It has a TiAIN coating for heat resistance and lubricity. The end mill has an American National Standard Stub length of cut and is designed for general purpose milling in steel, cast iron, aluminum, and other non-ferrous materials.