SN-1 (1/4) – Inverted Cone Shape Carbide Burr Single Cut • Inverted Cone Shape List Number SC91118 Substrate Carbide Surface Treatment Bright Package Quantity 1 Shank Diameter 1/4 Style SN-1 Length Of Cut 5/16 Diameter 1/4 Cut Style Single SKU: SC91118 Category: SN series - Inverted Cone Related products SN-42 (1/8) – Inverted Cone Shape Carbide Burr 1/8 Shank Single Cut Item #: SC91182 SN-1 (1/4) – Inverted Cone Shape Carbide Burr Double Cut Item #: SC90118 SN-53 (3/16) – Inverted Cone Shape Carbide Burr 1/8 Shank Double Cut Item #: SC90441