This is a simple strap adapter for the Bangle.js Espruino-based smartwatch so that you can use standard straps with it.

This particular one is setup for 22mm straps and uses 2x 23mm watch spring pins on each side (I just ordered a cheap box of mixed pin sizes online).

I printed with 100% infill for strength at such a small size and have successfully used both PLA and CPE filament.