Standard Pack = 1 piece(s). Center Diameter = 0.472 IN ; Clamping Diameter = 0.787 IN ; Height = 1.181 IN ; Inside Diameter = 0.512 IN ; Nose = 0.157 IN ; Series = 680-10 ; Turning Diameter = .827 - 1.575 IN ; Type = Right Hand Rotation Driving Disc ;