Aluminum Oxide Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 24 Overall Diameter 10 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 A/O 24 VERY COARSE Wheel Hardness Not Rated Wheel Type Type 1 Maximum Operating Speed 2 485 RPM Reducer Bushing Size 3/4 in 7/8 in 1 in Series 57A