I needed a simple hook for my shelves to hang up my old game sleeves. The hook can be used for shelves with 10 mm, 16 mm and 24 mm height. I have not tested intermediate values, but they might work for the next smaller choice.
As I like to change the game sleeves, but don't want to put any weight on the cupboards, I have attached a second hook on the back, where a second game sleeve of old games can be hung.
Of course, the hooks can also be used for other purposes, but I have not tested these.
I used PETG as the printing material because it is particularly stable. PLA should also work for lightweight objects such as game covers.
Tip:
The hook is filled with 15%, if a stable hook is required, adjust the filling if necessary.