Depressed Center Grinding Wheel, Abrasive Material Aluminum Oxide, Connector Size 7/8 in, Connector Type Unthreaded Hole, Grit 30, Overall Diameter 6 in, Overall Thickness 0.25 in, Primary Material Application Stainless Steel, Compatible Tool Type Angle Grinder, Series A30S, Wheel Type Type 27, Maximum Operating Speed 10,100 RPM, Grade Extra Coarse