It is a water bottle cage for a cycle.
It's divided into three components for easy print. The bar is inserted into by both bands, and all three bits are screwed into position in the mounting points on the bike. The underparts of the the bar has been strengthened to prevent breaking.
Print one of two and the bars of the bands. All three bits are contained in the "full plate" STL. I utilized a comparatively high infill while riding, so the parts wouldn't break.
Add the blocky elements of both bands into the bar, ensuring the holes line up. Bands work equally successful pointed down or pointed up.
- Screw the entire assembly into the frame in the mounting points of the bike.