Flaring Cup Grinding Wheel Abrasive Material Aluminum Oxide Back Thickness 3/8 in Connector Size 3/4 in Connector Type Unthreaded Hole Grit 60 Overall Diameter 3 in Overall Thickness 1 1/4 in Rim Thickness 1/4 in Primary Material Applicationn Aluminum Cast Iron Stainless Steel Steel Tool Steel Compatible Tool Type Tool and Cutter Grinder Specification 32A60-KVBE Wheel Hardness K Wheel Type Type 11 Maximum Operating Speed 7 640 RPM Series 32A Bond Type Vitrified