The Grainger Approved Square End Mill Single End is a high-speed steel end mill with a square end for milling slots, keyways, and pockets. It has a 1/2" shank diameter, a 1" cutting diameter, a 2" overall length, and 2 flutes. The end mill has a TiN coating for increased tool life and lubricity. It can machine steels, stainless steels, cast iron, aluminum, copper, brass, bronze, plastics, and other non-ferrous materials. This end mill is designed for use on CNC or manual milling machines.