Zirconia Alumina Connector Size 5/8 in Connector Type Unthreaded Hole Grit 16 Overall Diameter 8 in Overall Thickness 1 in Compatible Tool Type Die Grinder Primary Material Applicationn Nickel Alloy Stainless Steel Steel Titanium Tool Steel Specification 4NZ1634-Q5BS-X348 Wheel Hardness Q Wheel Type Type 1 Series NorZon Plus Grade Extra Coarse Item Portable Snagging Wheel