The Corner Radius End Mill from Grainger is a 4 flute end mill made of solid carbide with a corner radius of 1/8". It has a 1/2" shank diameter and an overall length of 2-1/2". The end mill has a TiAIN coating for increased tool life and can machine a variety of materials including steel, stainless steel, cast iron, aluminum, copper, brass, bronze, plastic and graphite. It is designed for high speed machining with speeds up to 21,000 RPM and feed rates up to 80 IPM. The end mill provides clean cutting action and smooth wall finish.