Standard Pack = 1 piece(s). Applications = Deburring,Finishing ; Center Hole Diameter = 1.25 ; Center Hole Diameter (Metric) = 31.75 ; Converted Form = Wheel ; Diameter(Inch) = 9 ; Diameter (Metric) = 228.6 ; Form Type = Unitized ; Max RPM = 5000 ; Mineral Type = Precision Shaped Ceramic Grain ; Position = Better ; Product Form = Wheel ; Thickness = 0.12598 ; Thickness (Metric) = 3.2 ; 3M Stock Number = 7100115789 ;