Nite IzeNite Ize O-Series Gated Key Ring, Stainless Steel Split Ring Alternative, 2 Pack

It works great with the small Nite Ize small metal carabiners.

Ingenious design for a round key loop. No more struggle trying to pry the tension loops apart and wind your key on. Simple to use and highly functional.

This does trap keys on it better than a conventional keyring, but the inlet for getting them on is a little undersized. My old model of Tile tracker couldn't make it on, but the newer model fits. Otherwise, it's sturdy and keeps keys on.

Good and sturdy easy to get keys on ring.

I bought these to replace the caribeaners that allowed my keys to magically fall off. I couldn't be happier, I haven't lost anything attached to them. They feel very sturdy and I don't suspect having to replace them any time soon.

Works well enough for standard keys but the opening is too narrow for anything else. Slightly larger keys or irregularly shaped keys such as bike lock keys won't work with this ring.

If you have a lot of keys sometimes rings get bent and a key gets loose. This solves that, but i did have one almost escape. Somekeys dont fit though

This is as good as anything in its product class. I much prefer this to the double-gate or yin-yang version from Nite-Ize that this is the same size as.