Model is at: https://cad.onshape.com/documents/b7125436aee8456cc5d37f69/w/2e83c03e564087124bfefbc5/e/12584de49d929c93e699be82
I printed with PLA, 50% infill and 3 perimeters.
Since the model is printed flat, the hook itself is not so strong. That's why I added a hole from behind where I inserted a threaded screw (I heated it first before inserting). This gives the hook strength.
Enjoy!
The author marked this model as their own original creation.