Forney 71638 Sanding Discs, Blue Zirconium with 7/8-Inch Arbor, 7-Inch, 36-Grit, 3-Pack Original 100% zirconia grain These high quality discs cut faster and longer than most other discs on the market High performance for grinding, deburring and polishing metals, welds and stainless steel Fast stock removal Extremely long life with cool cutting action