Straight Cup Grinding Wheel Abrasive Material Aluminum Oxide Back Thickness 1/2 in Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 60 Overall Diameter 6 in Overall Thickness 2 in Rim Thickness 1/2 in Compatible Tool Type Tool and Cutter Grinder Primary Material Applicationn Nickel Alloy Steel Tool Steel Specification 38A60-KVBE Wheel Hardness K Wheel Type Type 6 Maximum Operating Speed 3 820 RPM Bond Type Vitrified Series 38A Package Quantity 5