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 4 flutes and a right-hand cut. The overall length is 3 inches and the shank diameter is 1/2 inch. The mill diameter is 1 inch with a 1/8 inch shank neck length. It has a TiN coating for increased tool life and lubricity. The end mill is designed for use on steel, stainless steel, cast iron, aluminum, copper, brass, bronze, plastic, and fiberglass at speeds up to 2000 SFM when used with rigid setups.