Carabiner
thingiverse
Only use support on the frame. I was able to apply my full weight to this carabiner. it is designed to be more printer-friendly with less support and excess material use.
Download Model from thingiverse
With this file you will be able to print 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 Carabiner.