Snap Hook
thingiverse
I haven't tried this yet, but I see no reason why it wouldn't work. It's a remix of a hook that I designed and printed successfully myself. For best results, I'd strongly discourage using PLA (it's brittle) and strongly encourage PETG (it's tough and flexible). If you print this, hit me up and let me know how it went. I don't really need this item, so I may never actually print one. I just did it because the idea was interesting to me, and I hope someone enjoys it.
Download Model from thingiverse
With this file you will be able to print Snap Hook 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 Snap Hook.