This is a headphone stand or hook for use on desks with gaps in between the tabletop and the bottom. The stand is just wide enough to prevent it from rolling and dropping the headphones. Reinforcement structures will prevent the hook from dipping and dropping the headphones. Use this design if you like minimalism and aren't happy with the thick stands that you see on the site.
After using it for a while, I've seen that the design will not work well with PLA filaments. You'd need to use something stronger.
The author remixed this model.
The original model was too thick for the gap in my desk and I also wanted to reduce the structures a bit more so as to reduce the amount of plastic used. So I kept the original idea but changed the design quite a bit to suit my particular needs.
The new design requires a gap of only 2 mm to be available. If you have a greater amount of gap, you can hopefully push the stem of the hook even further to make it stable.