Ball center for use in all RockJock "narrow" 2" Johnny Joint® rod ends with the 1 piece bushing features a .500" thru bolt hole and a 1.750" mounting width. For use as a rebuild part or for those building up their own arms and joints. Ball is CNC machined steel and heat treated for extremely long life. For use as a rebuild part or for those building up their own arms and joints. NOTE: This ball center features a groove denoting the side of the ball that is to go on the snap ring side of the Johnny Joint® when the joint is being assembled. This allows the width of the ball center to be on centerline with the bar that the joint is installed on.