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 a 14 tooth count. The end mill features a TiN coating for increased tool life and lubricity. It is designed for use on steel, stainless steel, cast iron, aluminum, copper, brass, bronze, plastic, and fiberglass at speeds up to 2000 SFM.