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 Aluminum Brass Cast Iron Copper Stainless Steel Steel Compatible Tool Type Angle Grinder Series The Ultimate Cut Wheel Type Type 27 Maximum Operating Speed 13 300 RPM Grade Medium