Depressed Center -Off Wheel, Abrasive Material Ceramic, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 24, Overall Diameter 7 in, Overall Thickness 0.125 in, Primary Material Applicationn Cast Iron, Compatible Tool Type Angle Grinder, Series Norton NorZon Plus, Wheel Type Type 27, Maximum Operating Speed 8,600 RPM, Grade Extra Coarse