Depressed Center Grinding Wheel, Abrasive Material Aluminum Oxide, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 46, Overall Diameter 7 in, Overall Thickness 0.25 in, Primary Material Applicationn Aluminum, Brass, Copper, Compatible Tool Type Angle Grinder, Series A46N, Wheel Type Type 27, Maximum Operating Speed 8,500 RPM, Grade Coarse