fidget gear keychain spinner

I was asked once to add a key-chain attachment option to my rings (which you might want to check out, too) and here is the result. This model had it's debut at JRRF 2025 (Japan RepRap Festival, Tokyo) as giveaways to inspire and show the potential of 3D printing. It had some custom imprint that is of course not on the model for download here. Even without attaching anything I often prefer this one over a ring, since the ‘lever’ adds some more ways to fidget with this thing. You can even emulate a clicky lever switch by pressing your thumb's fingernail into the outer indents, using it as the clicky spring (see last photo).And of course you can attach keys or other stuff and spin it around. Be careful with that though to avoid hurting or damaging…This ring also comes with slots for the turn tool, in case you have problems breaking it free, or if you want to use a power tool to break it in. I uploaded a few sizes; 16mm and 18mm are usually fine for teenagers and adults, 14mm is mo