Aluminum Oxide, Connector Size 1 in, Connector Type Unthreaded Hole, Grit 36, Overall Diameter 7 in, Overall Thickness 1 in, Compatible Tool Type Bench Grinder, Primary Material Applicationn Cast Iron, Stainless Steel, Steel, Tool Steel, Specification A36-VBE, Wheel Hardness V, Wheel Type Type 1, Maximum Operating Speed 3,600 RPM, Reducer Bushing Size 1/2 in, 5/8 in, 3/4 in, 7/8 in, Grade Coarse, Bond Type Vitrified, Color Brown, Item Straight Grinding Wheel