I began modelling this same wrench as an M2.5 wrench for using with Adafruit M2.5 nylon standoffs and it worked well, unfortunately the M2.5 nylon nuts are bigger, so it won't work on them, then I realised that M3 is probably more commonly used for 3d printers and little tinkering projects, so I redid this and tested it and here it is.
Works well in PETG.
The author hasn't provided the model origin yet.