Ball Bur SD, Double Cut, Shank Dia.
1/4 in, Head Dia. 5/16 in, Length of Cut 5/16 in, Overall Length 2 in, Trade Number SD-2, Abrading Application Grinding on a Wide Variety of Materials, Coating Bright (Uncoated), Head Material Carbide Carbide Bur,Ball Shape,5/16 in.