For my original setup I printed many of the Hook3 in transparent PET and screwed them from behind with screws of 3.5mm diameter on a wood board. Like this I have for 10 hooks only 3 holes in the wall. The screw holes have a distance of 35mm.
But can also be printed in PLA. I use about 20% infill and no support. The Hook3 is printed with the screw holes on the print surface.
For heavy load there is the the Hook1 that can be printed on the side.
Additionally there is the Hook1Mount that can be positioned on flat head screw with a maximal head diameter of 7mm.
The author hasn't provided the model origin yet.