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 -Off Tool, Die Grinder, Primary Material Applicationn Stainless Steel, Steel, Series Gemini Long Life, Wheel Type Type 1, Maximum Operating Speed 19,100 RPM