A relatively big, strong and probably over-engineered hook. How strong is it? Well I have no idea, but quite a bit. I used it in the garden shed to hang a long extension cord which is fairly heavy.

The hook has an inner diameter of 9 cm and it features a rib on the bottom part which provides a reinforcement to the hanging section of the hook and also helps transferring a part of the force generated from the load directly on the wall.

Originally uploaded on Thingiverse, but too good of a model to not have here as well. https://www.thingiverse.com/thing:4797142

I printed on side with supports touching build plate, from PETG. 4 walls + 50% gyroid infill.