Had been unable to release the ball on my helix piercing labret. These tweezers mean you can really grip the ball to turn it, although I had to have a clamp securing the bar too. Use it all the time now when changing the earring on cartilage piercings.
Unfortunately it didnt help me unscrew a ball out from a really tight and crooked piercing. I did try on a normal ball to hold it and unscrew it and it worked.