Key Wallet

thingiverse

This key holder demands two bolts and two nuts to securely hold its parts together, supplemented by washers that fill any gaps between the halves when there aren't enough keys. I've edited the design to include a warning: the key wallet failed after just one month without any visible cause. It's likely that the ABS plastic wasn't resilient enough to withstand repeated slight flexing in a pocket. The sharp edges of broken ABS are also quite bothersome. I strongly recommend using a more rubbery, flexible material.