Norton 66252843213 Zirconia Alumina Type 27 Depressed Center Wheel, 4 1/2", 1/4", 24 Grit, 5/8-11 UNC, 13580 RPM

•A blend of R&D advanced chemistry and shaped zirconia alumina abrasive and premium aluminum oxide grain

•Up to 20 percent increase in performance and life over our former zirconia alumina wheels

•Excellent performance-to-price ratio for lower total grinding costs