Intex pool inlet wrench

I got the Intex pool inlet really stuck and was not able to unscrew it from the retainer anymore.
I could not get a good grip and normal wrench would damage it so I drew a custom wrench that could fit around the inlet for better grip.

Thick walls are recommended (i.e. 4x0.48mm)
The rest does not seem to matter that much as long as you get good layer adhesion.
I printed it with PLA+
4 walls with alternating extra
No support, no brim, etc
Layer height 0.2