Dish Grinding Wheel Abrasive Material Aluminum Oxide Back Thickness 3/8 in Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 46 Overall Diameter 6 in Overall Thickness 3/4 in Rim Thickness 3/8 in Primary Material Applicationn Aluminum Cast Iron Stainless Steel Steel Tool Steel Compatible Tool Type Tool and Cutter Grinder Specification 32A46-KVBE Wheel Hardness K Wheel Type Type 12 Maximum Operating Speed 4 140 RPM Bond Type Vitrified Color Purple Grade Medium