Depressed Center Grinding Wheel Abrasive Material Silicon Carbide Connector Size 7/8 in Connector Type X-Lock Grit 24 Overall Diameter 4 1/2 in Overall Thickness 0.25 in Primary Material Applicationn Stainless Steel Steel Compatible Tool Type Angle Grinder Series X-LOCK Wheel Type Type 27 Maximum Operating Speed 13 280 RPM