I made this wrench some time ago when I was missing the correct 25 mm / ER16(A) wrench size to change collets on my AMB 1050FME milling motor.
As I am only changing the collets and the print is pretty strong until now, I never bothered to buy a metal one.
The print gets stronger with more plastic, so 3 to 4 perimeters and a higher infill like 25 to 30% rectilinear worked for me until now.
If printed in plastic, be aware to not be hurt when the print breaks or splinters if it is used too heavily.
The author marked this model as their own original creation.