Needed a replacement Moen install tool, to remove my Moen faucet. This took the place of Moen part 118305. I uploaded the OpenSCAD file as well, which will let you customize it to your own size or for some other project. You can comment out a few lines (indicated) to remove the knobs or the 1/2 socket walls. I was able to grab this thing with vice grips and it held up no problem, so you may not need the knobs.
I blogged about it here: http://n8foo.com/blog/3d-printing-plumbing-tools
PLA, 100% infill, no rafts, 0.35 layer height. Worked like a champ!