Aluminum Oxide Connector Size 1 1/2 in Connector Type Unthreaded Hole Grit 24 Overall Diameter 14 in Overall Thickness 2 in Compatible Tool Type Bench Grinder Pedestal Grinder Primary Material Applicationn Aluminum Brass Bronze Cast Iron Copper Nickel Alloy Stainless Steel Steel Titanium Tool Steel Specification 57A24-QVBE Wheel Hardness Q Wheel Type Type 1 Maximum Operating Speed 2 320 RPM Reducer Bushing Size 1 in 1 1/4 in Series 57A Grade Extra Coarse