Depressed Center Wheels, Abrasive Wheel Type Type 27, Abrasive Wheel Diameter 6 In., Thickness 1/8 In., Arbor Hole Size 7/8 In., Abrasive Material Zirconia Alumina, Abrasive Grit 24, Max. RPM 10,200, Series Ultimate Pipeline, Grade Extra Coarse, Application Metalworking, Cutting, Grinding, Deburring