This tool simplifies ball joint separation. 
Its adaptors screw into the joint thread in place of the nut, seating firmly against the thread end.
An air impact hammer with the included punches can then rapidly vibrate the taper joint loose.
Content:
8pcs Ball Joint, thread sizes: 
M10 x 1.25mm, M10 x 1.5mm, M12 x 1.25mm, M12 x 1.5mm, 
M12 x 1.75mm, M14 x 1.5mm, M14 x 2.0mm, M16 x 1.5mm.
2 x air hammer punches.
1 x 17mm hex punch to align the impact gun where required. 
Ball joint can also be used with a hammer.