I saw the flip keychain but didn't like the way the fingers looked. So i found another middle finger model (unfortunately I can't seem to find it on printables) and redesigned it in a similar way to that of the original.

I gave it a decent amount of clearance, so should be an easy print in place. You can go smaller, but going larger might be tricky with the clearance as is.

Now go and print some f*cks to give