Harvey Tool 759530-C3 | 5/16" Diameter x 1/16" Width x 5/16" Shank AlTiN Coated Carbide Woodruff-Keyseat CutterHarvey Tool has long offered the industry's best selection of Keyseat Cutters. Its line of square profile Keyseat Cutters are offered in three unique styles: Standard Slotting, Deep Slotting, or Max Slotting, allowing machinists to select the tool most appropriate for their application. Keyseat Cutters Down to 1 16" Diameter Both sides of cutter are dished for clearance Solid carbide CNC ground in the USA Product Specifications Cutter Diameter (Inch)