Standard Pack = 1 piece(s). Center Diameter = 0.394 IN ; Clamping Diameter = 0.629 IN ; Height = 1.299 IN ; Inside Diameter = 0.433 IN ; Nose = 0.157 IN ; Series = 680-10 ; Turning Diameter = .669 - 1.260 IN ; Type = Right Hand Rotation Driving Disc ;