Task Grinding Wheel, 6 in Diameter, 3/4 in Thickness, 1 in Arbor/Shank, 80 Grit, Grade: Medium, Aluminum Oxide Abrasive, 4450 rpm Maximum, Gray, Applicable Materials: Cast Iron, Stone, Glass, Rubber and Non Ferrous Metals, Metals, Rubber and Plastic, For General Grinding of All Metals, Harpening Carbide Tools, Saws, Lathe Tools, Milling Cutters and Masonry Drill Bits