Flaring Cup Grinding Wheel Abrasive Material Aluminum Oxide Back Thickness 1/2 in Connector Size 1 1/4 in Connector Type Unthreaded Hole Grit 60 Overall Diameter 4 in Overall Thickness 1 1/2 in Rim Thickness 1/4 in Primary Material Applicationn Nickel Alloy Steel Tool Steel Compatible Tool Type Tool and Cutter Grinder Specification 38A60-JVBE Wheel Hardness J Wheel Type Type 11 Maximum Operating Speed 5 730 RPM Series 38A Bond Type Vitrified Face Profile Z Package Quantity 10