I used to have one that had both sizes in one socket, think it was SK but can't remember now. That was back when I was a Mechanic for a living. Must have changed a hundred ball joints with it atleast. Best way is to loosen the ball joint from the spindle, leave bj shaft in spindle with the castle nut on it a few threads to hold it. Then break the ball joint loose from the upper control arm with a breaker bar and a cheater pipe. Once broken loose finish taking it out with an impact gun. Be careful when re installing in the upper control arm to no not cross thread the new ball joint. Screw the new ball joint down as tight as you can get it with the impact gun, then make sure its tight with breaker bar and cheater pipe. Put shaft back in spindle, tighten castle nut, install cotter pin. Piece of cake.