Depressed Center Grinding Wheel Abrasive Material Aluminum Oxide Connector Size 7/8 in Connector Type Unthreaded Hole Grit 36 Overall Diameter 5 in Overall Thickness 0.125 in Primary Material Applicationn Stainless Steel Steel Compatible Tool Type Angle Grinder Series Gemini Flexible Wheel Type Type 29 Maximum Operating Speed 12 225 RPM Grade Extra Coarse