Aluminum Oxide Connector Size 1 1/2 in Connector Type Unthreaded Hole Grit 60 Overall Diameter 12 in Overall Thickness 2 in Compatible Tool Type Bench Grinder Primary Material Applicationn Cast Iron Stainless Steel Steel Tool Steel Specification A60-VBE Wheel Hardness V Wheel Type Type 1 Maximum Operating Speed 2 070 RPM Reducer Bushing Size 1 in 1 1/4 in Grade Medium Bond Type Vitrified Color Brown Item Straight Grinding Wheel