Summary

This is a triangle ring of the sort with a strap slot and a hole for clipping onto. It's customizable; this model is preset for a 2-inch strap, but you can customize it for other strap widths and thicknesses.

NOTE: Don't use this for anything where it could injure or kill someone if it breaks. I subjected my print to the “can I pull it apart with my bare hands” test and nothing more, and even then, your printer/filament may vary.