Abrasive -Off Wheel, Abrasive Material Aluminum Oxide, Grit 60, Connector Size 3/8 in, Connector Type Unthreaded Hole, Overall Diameter 4 in, Overall Thickness 0.035 in, Compatible Tool Type Die Grinder, Primary Material Applicationn Cast Iron, Steel, Series Carbo Gold, Wheel Type Type 1, Maximum Operating Speed 19,100 RPM, Reinforced Status Reinforced, Bond Type Resin