Aluminum Oxide Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 46 Overall Diameter 12 in Overall Thickness 1 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 57A46-MVBE Wheel Hardness M Wheel Type Type 1 Maximum Operating Speed 2 710 RPM Reducer Bushing Size 1 in Series 57A Grade Coarse Bond Type Vitrified