Depressed Center Cut-Off Wheel Abrasive Material Aluminum Oxide Connector Size 7/8 in Connector Type Unthreaded Hole Grit 60 Overall Diameter 4 1/2 in Overall Thickness 0.045 in Primary Material Applicationn Stainless Steel Compatible Tool Type Angle Grinder Series A60S Wheel Type Type 27 Maximum Operating Speed 13 300 RPM Grade Medium