Depressed Center Grinding Wheel, Abrasive Material Ceramic, Connector Size 5/8 in, Connector Type Unthreaded Hole, Grit 36, Overall Diameter 4 in, Overall Thickness 0.25 in, Primary Material Applicationn Stainless Steel, Steel, Compatible Tool Type Angle Grinder, Series CUBITRON II, Wheel Type Type 27, Maximum Operating Speed 10,200 RPM, Color Black, Grade Extra Coarse