It sure spins, but it's a very cheap build. rattly, tolerances are lax, and spins for less than half a second. Don't expect something as smooth as a bearing. Built up metal dust around the two rings too, even though I did try to use WD40.

The ring is great! I have very small hands, so I was a bit worried that the smallest size wouldn't fit, but thankfully it's pretty secure around my middle finger and thumb. It spins super smoothly, and while it doesn't gain a lot of momentum, it's very satisfying and a great stim toy. It's a bit noisy, so if you're looking for something silent, this might not be for you. But personally, I'd say it's definitely on the quieter side, as I've worn and stimmed with it during lectures and had no issues. Great purchase, would recommend! :D