One-piece safety lock key ring carabiner
thingiverse
This thing is a carabiner that can serve as a key ring and that has a built-in feature to help prevent keys from coming off. https://youtu.be/QGawO7zZjdI
Download Model from thingiverse
With this file you will be able to print One-piece safety lock key ring carabiner with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on One-piece safety lock key ring carabiner.