Aluminum Oxide, Connector Size 1 1/4 in, Connector Type Unthreaded Hole, Grit 120, Overall Diameter 7 in, Overall Thickness 1/2 in, Compatible Tool Type Cylindrical Grinder, Surface Grinder, Tool and Cutter Grinder, Primary Material Application Nickel Alloy, Steel, Tool Steel, Specification 38A120-JVBE, Wheel Hardness J, Wheel Type Type 1, Maximum Operating Speed 3,600 RPM, Series 38A, Grade Fine, Bond Type Vitrified, Color White, Item Straight Grinding Wheel, Package Quantity 5