Zirconia Alumina Connector Size 5/8 in Connector Type Unthreaded Hole Grit 14 Overall Diameter 6 in Overall Thickness 1 in Compatible Tool Type Die Grinder Primary Material Applicationn Nickel Alloy Stainless Steel Steel Titanium Tool Steel Specification 4NZ14-RBS-X406 Wheel Hardness R Wheel Type Type 1 Maximum Operating Speed 8 000 RPM Series BlueFire Grade Extra Coarse Bond Type Resin Color Black Item Straight Grinding Wheel