9 x 1/4 x 5/8-11 High Performance Metal Grinding Wheel
-11, Connector Type Threaded Hole, Grit 24, Overall Diameter 9 in, Overall Thickness 0.Depressed Center Grinding Wheel, Abrasive Material Aluminum Oxide, Connector Size 5/8 In.25 in, Primary Material Applicationn Steel, Compatible Tool Type Angle Grinder, Series A24R, Wheel Type Type 27, Maximum Operating Speed 6,600 RPM, Grade Extra Coarse.