That's what kettlebells used to be called back in the early 1900's when they were used by such Iron Game luminaries such as Sig Klein and Eugene Sandow. And that's one of the first things I thought about kettlebells when I first got my hand on one was how much it resembled the rings I was used to swinging on as a gymnast, as well as the pommel on the side horse. A ring weight indeed.
Forget about double bells or two hands with anything over my head. I thought of more irony that I once could do 22 free handstand pushups on the rings at the END of my workout. How far I had fallen.