Inexpensive Ball Joints - Put GREASE In Them First!
While the title mentions ball joints specifically, I've realized this applies to most everything mechanical I've ever purchased from the cheapanese: Thoroughness of assembly and lubrication are severely lacking!
Case in point, these GES...
If you really want to pick the very best clamps, go with aviation style T-bolt clamps.
Something like this:
https://www.amazon.com/Kuriyama-TBC-SSC022-T-Bolt-Stainless-Carbon/dp/B00H7YNXQ0/ref=mp_s_a_1_1