Depressed Center Grinding Wheel, Abrasive Material Aluminum Oxide, Connector Size 7/8 in, Connector Type Unthreaded Hole, Grit 24, Overall Diameter 5 in, Overall Thickness 0.25 in, Primary Material Application Steel, Compatible Tool Type Angle Grinder, Series Metal AO, Wheel Type Type 27, Maximum Operating Speed 12,200 RPM, Grade Extra Coarse