Wall hook with hidden screws

I needed some sturdy wall hooks, so I created these models in CAD. 
But to be honest: In the modeling I oriented myself on the wall hooks that have already been installed in my apartment for 20 years. From that point of view, this is a clone. But with my own ideas, in terms of dimensions and appearance.

Print the parts as they were modeled. That means the hook should be printed lying down and with tree supports so the perimeters go all the way around the hook and it gets more strength.
Then attach the base to the wall with two screws and slide the hook onto the base until it snaps into place.
For better durability use at least three, better four perimeters