Recessed Grinding Wheel Abrasive Material Ceramic Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 60 Overall Diameter 7 in Overall Thickness 1 in Wheel Hardness J Specification 5SG60-JVS Wheel Type Type 5 Compatible Tool Type Cylindrical Grinder Surface Grinder Primary Material Applicationn Cast Iron Nickel Alloy Stainless Steel Steel Titanium Maximum Operating Speed 3 600 RPM Recess Depth 1/2 in Recess Diameter 2 3/4 in Bond Type Vitrified Color Blue