A carabiner to secure your keyring!
Lots of carabiner options on thingiverse. I like http://www.thingiverse.com/thing:5689 the best but I wanted smoother edges so it's more comfortable to squeeze. Also I changed the cut slightly so it catches less on my belt loop.
KeyCarabiner_5mm.stl | 101.2KB | |
KeyCarabiner_6mm.stl | 101.2KB | |
KeyCarabiner_7mm.stl | 101.2KB | |
KeyCarabiner_v1.scad | 1.9KB |