SAIT Sait-Lok Abrasive Disc, Close Coated Premium, 5 in Diameter Disc, 7/8 in Center Hole, 80 Grit, 3Z Zirconium Abrasive, Fiber Backing, Applicable Materials: Aluminum, High Tensile Steel, Stainless Steel, Titanium, Ferrous and Non-Ferrous Metals, 12200 rpm Maximum