Here we are, this is the keychain you were looking for E V E R Y W H E R E. I know that ‘cause i was searching for one for a looong time and the existing models weren't efficient to allow an high-quality print, so i decided to make my own one and share it with the community! It's extremely easy and fast to print, a printing failure is very rare for this model.
I printed it using a Prusa i3 MK3S and a CTC Prusa i3 Pro B Rev A, both printers made a good job.
Feel free to use Cura or PrusaSlicer's default settings, it's near to impossible to make the wrong thing.
The author marked this model as their own original creation.