Aluminum Oxide, Connector Size 1 1/2 in, Connector Type Unthreaded Hole, Grit 24, Overall Diameter 12 in, Overall Thickness 2 in, Compatible Tool Type Bench Grinder, Primary Material Application Cast Iron, Stainless Steel, Steel, Tool Steel, Specification A24-VBE, Wheel Hardness V, Wheel Type Type 1, Maximum Operating Speed 2,070 RPM, Reducer Bushing Size 1 in, 1 1/4 in, Grade Extra Coarse, Bond Type Vitrified, Color Brown, Item Straight Grinding Wheel