Aluminum Oxide, Connector Size 5 in, Connector Type Unthreaded Hole, Grit 46, Overall Diameter 14 in, Overall Thickness 1 1/2 in, Compatible Tool Type Cylindrical Grinder, Surface Grinder, Tool and Cutter Grinder, Primary Material Applicationn Nickel Alloy, Steel, Tool Steel, Specification 38A46-IVBE, Wheel Hardness I, Wheel Type Type 1, Maximum Operating Speed 1,800 RPM, Series 38A, Grade Coarse, Bond Type Vitrified, Color White, Item Straight Grinding Wheel