3/16 in, Length of Cut 5/32 in, Overall Length 2 in, Trade Number SD-81, Abrading Application Build Up Welding Preparation, Contouring, Hole Deburring, Metalworking, Coating Bright (Uncoated), Head Material Carbide, Head Material Grade C2 Submicron.Carbide Bur,Ball Shape,3/16,3/16 Shank 3/16 in, Head Dia.