Abrasive -Off Wheel, Abrasive Material Aluminum Oxide, Grit 60, Connector Size 7/8 in, Connector Type Unthreaded Hole, Overall Diameter 4 1/2 in, Overall Thickness 0.045 in, Compatible Tool Type Angle Grinder, Primary Material Applicationn Steel, Series Carbo Gold , Wheel Type Type 1, Maximum Operating Speed 13,580 RPM, Reinforced Status Reinforced, Bond Type Resin