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 straight shank and is uncoated with an overall length of 2 inches and a shank diameter of 1/2 inch. The number of flutes is 2 and it has a right hand spiral. The end mill has an American Standard taper and is made in the USA. It can machine steels, cast iron, aluminum, wood, and plastic.