This is a keyring designed as a fidget.

It is small. Requires almost no filament to print. And Is easy to assemble. Just use some glue, to make sure the parts stick together.

The finished product can be attached to a normal keyring so it sits with your other keys. I designed this model with the trapez keyhead in mind. But it should also work with most round keys. Which is why the pin only attaches to the key via a cylinder. So it should work with most keys.