Depressed Center Grinding Wheel Abrasive Material Silicon Carbide Connector Size 7/8 in Connector Type Unthreaded Hole Grit 36 Overall Diameter 4 1/2 in Overall Thickness 0.25 in Primary Material Applicationn Stainless Steel Steel Compatible Tool Type Angle Grinder Series A36 UA-GFX Wheel Type Type 27 Maximum Operating Speed 13 300 RPM Color White Grade Extra Coarse