I bought a Harbor Freight C Press, a Pit Bull C Press and I rented a Autozone C Press.

The Autozone Press turned out to have a dented area so I could not have used it. The Autozone Press was the best fitted and finshed of the 3 Pesses.

The Harbor freight one was the cruder of the 3 but worked.

All of them were made very close to each other in size and the Screws were interchangable none seemed to have any advantage over the others with the exceptin that the Disc that come with the Harbor Freight one are way cruder. But, I am still gald bought them.

I used one of the C Presses on My Volvo U-joint job and that is one of the things they can be used for.
If you look back at some old Manuals they were used to press out King Pins. I am thinking that the use as a Ball Joint Press came along later as older Cars did not have Ball Joints.

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84 300D, 82 Volvo 244Gl Diesel