Wall brush-scratcher cat

The idea came from owning 4 cats and their constant need for scratching. But since cats do not have such efficient movement of arms as we do, they need help. So I made some models that should satisfy this need, they are easy to print, all models have mounting holes (4mm) and flat surface for easy double tape placing.
Scratching pins on the model have pyramid like shape, which will withstand many months if not years of usage. My cats love it, even the dog :D