The Micro 100 Corner Radius End Mill from Grainger is a bright finish, carbide end mill with a corner radius of 0.031 inches. It has a 1/4 inch shank diameter and is made in the USA. The end mill has 2 flutes and can machine a variety of materials including steel, stainless steel, cast iron, aluminum, copper, brass, bronze, plastic, and graphite. It is center cutting and has a right hand spiral. The overall length is 2 inches and it has a 0.5 inch cutter diameter.