Double-cut carbide burr ball Shape, has a chisel-tooth cutting pattern, eliminates loading, and minimizes chatter. It has a smooth cutting style ideal for use on Metal, Stainless steels. It measures 3/8 inch diameter, 5/16 inch cut length. Its overall length is 3-1/2 inches. and has a 1/4 shank and a maximum grinding speed of 23000.