The first pic is mine. You need to remove the Ball Joint Boot in order to use the C-press.
If I had it to do again I would have taking the time to grind a Washer to go between the Joint and the C-press where the red arrow is as Joint (a Lemforder) is some what rounded where the C-Press makes contact and the does not make it as easy for the C-press to be kept flat on the joint.

I turned the C-press with a socket and a Breaker Bar but I was reinstalling the Old Ball Joints. They still went in hard; lubed with Motor Oil.

Last Pic: On the forums I have seen pics of 2 different persons using the C-press with an Impact Wrench. I have not done this so I cannot comment on it.

If you us one of the Autozone C-presses before you rent it take a look at the area that is going to contact the Joint. On the one I looked at that area was deformed by someone who had used it previously.

I rented that Autozone one anyway as I wanted to compare C-Presses. I own 2 C-presses. The one in the pic is a PitBull one and I got a Harbor Freight one when on sale.
The Autozone one was better quality of the 3 presses.

Note; the C-press can be used for other things. A few weeks after pressing in the Ball Joints I was using it to Press in the Bearing Caps on a U-joint.

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