Flaring Cup Grinding Wheel Abrasive Material Aluminum Oxide Back Thickness 1/2 in Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 46 Overall Diameter 6 in Overall Thickness 2 in Rim Thickness 3/8 in Primary Material Applicationn Nickel Alloy Steel Tool Steel Compatible Tool Type Tool and Cutter Grinder Specification 38A46-KVBE Wheel Hardness K Wheel Type Type 11 Maximum Operating Speed 3 820 RPM Series 38A Bond Type Vitrified Face Profile Z Package Quantity 5