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.

I provide the STEP file but if you use OnShape you can clone the original project (public) here.

For who tried or would like to tip me: thanks for the thought, but I do not wish to get any money for my designs. I would be more than happy if you donate whatever you would have give me to a charity or research institute of your choice.