Performance Tool W89304 4-in-1 Ball Joint Adapter Set This set includes the necessary tools to service press fit type ball joints without removing the control arm. Service most car and light truck U joints either on or off the vehicle. 4 x 4 adapters allow removal and installation of upper and lower ball joints on 1967 to current 4WD vehicles with Dana 44 axles. In addition, remove and install brake anchor pins. Expand the service capabilities of this set with the W89305 Master Ball Joint Adapter Set.