Aluminum Oxide Connector Size 1 in Connector Type Unthreaded Hole Grit 36 Overall Diameter 6 in Overall Thickness 3/4 in Compatible Tool Type Bench Grinder Primary Material Applicationn Cast Iron Stainless Steel Steel Tool Steel Specification A36-VBE Wheel Hardness V Wheel Type Type 1 Maximum Operating Speed 4 140 RPM Reducer Bushing Size 5/8 in 3/4 in 7/8 in Grade Coarse Bond Type Vitrified Color Brown Item Straight Grinding Wheel