Straight Grinding Wheel, Type 1, Wheel Type Bench/Pedestal, Diameter 8 In., Thickness 1 In., Arbor Size 1 In., Abrasive Material Aluminum Oxide, Bond Type Resin, 100/120 Grit, Grade FineMax. RPM 3600, Gray, For Carbon SteelIncludes 5/8 In., 3/4 In. and 7/8 In. Arbor Bushings Aluminum OxideDesigned for general purpose off-hand grinding of a variety of steel types.Bench and Pedestal Grinding WheelsNortonUse very coarse to medium grit sizes for roughing applications and removing large amounts of material. Use fine and extra-fine grit sizes for finishing, deburring, and sharpening applications.