Depressed Center Cut-Off Wheel Abrasive Material Zirconia Alumina Connector Size 7/8 in Connector Type Unthreaded Hole Grit 36 Overall Diameter 4 1/2 in Overall Thickness 0.045 in Primary Material Applicationn Stainless Steel Steel Compatible Tool Type Angle Grinder Series Z-Tech Wheel Type Type 27 Maximum Operating Speed 13 300 RPM Grade Extra Coarse