A well finished, well designed shower head ball swivel!
I needed to replace a shower arm (the pipe that threads into the plumbing inside the wall and sticks out a few inches) with one of the long angled, 'S' shaped ones in order to lower the shower head about a foot, but a close ceiling arch stopped me from being able to thread it in. So I threaded this swivel ball adapter onto a standard 1/2" npt pipe nipple and threaded it into the wall fitting. Loosening the swivel adjustment allowed the swivel ball and pipe nipple to be screwed into the wall fitting without turning the 'S' shaped shower arm. When the pipe nipple was tight I then re-tightened the swivel ball adjustment. Voila! the shower head was now position about a foot lower.
This has to be one of the best purchases I've made in a long time, old school solidly built, I hope that I will never have to settle for less, no more box stores for me after this purchase, you have my business from now on, thank you