SD-51 (1/4) – Ball Shape Carbide Burr 1/8 Hardened Shank Single Cut List Number SC91403 Substrate Carbide Surface Treatment Bright Package Quantity 1 Shank Diameter 1/8 Style SD-51 Shank Type Hardened Length Of Cut 1/4 Diameter 1/4 Cut Style Single SKU: SC91403 Category: SD series - Ball Related products SD-2 (5/16) – Ball Shape Carbide Burr Single Cut Item #: SC91057 SD-2 (5/16) – Ball Shape Carbide Burr Double Cut Item #: SC90057 SD-9 (1″) – Ball Shape Carbide Burr Single Cut Item #: SC91063