Aluminum Oxide Connector Size 5/8 in Connector Type Unthreaded Hole Grit 24 Overall Diameter 5 in Overall Thickness 1 in Compatible Tool Type Bench Grinder Centerless Grinder Cylindrical Grinder Pedestal Grinder Tool and Cutter Grinder Primary Material Applicationn Aluminum Brass Bronze Cast Iron Copper Steel Specification 57A242-R5B7SL Wheel Hardness R Wheel Type Type 1 Maximum Operating Speed 7 260 RPM Series 57A Grade Extra Coarse Bond Type Resin Color Black