Depressed Center Grinding Wheel Abrasive Material Aluminum Oxide Connector Size 7/8 in Connector Type Unthreaded Hole Grit 24 Overall Diameter 6 in Overall Thickness 0.25 in Primary Material Applicationn Aluminum Compatible Tool Type Angle Grinder Series A24R Wheel Type Type 27 Maximum Operating Speed 10 100 RPM Grade Extra Coarse