simple hook two parted

It is not too stylish but it is simple, easy and fast to print.
It is strong enough to be useful thing, not just a toy, if you set 40% or more infill and 1.5mm thickness shell.
It already has proper gaps so just print and assemble it.
It is hold to wall by a pair flat head screws for wood.

I prefer use this thing to perform test prints after some printer modifications or other hardware routine.