Cut-Off & Grinding Wheel, Abrasive Material Ceramic, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 24, Overall Diameter 9 in, Overall Thickness 0.125 in, Primary Material Application Stainless Steel, Steel, Compatible Tool Type Angle Grinder, Series NorZon Plus SGZ, Wheel Type Type 27, Maximum Operating Speed 6,600 RPM, Grade Extra Coarse The NORTON Type 27 high-performance grinding and cutting wheel features ceramic/zirconia alumina abrasive grain for best performance. Use for ferrous metal, gray iron, and stainless steel.