1 1/8" (29 mm) wrench
thingiverse
I modified http://www.thingiverse.com/thing:9704 I have included the shapes.scad file I had to run down on the internet in the SCAD package. The "use" line was not working for me in OpenSCAD. I adjusted the handle to not be a cube, I needed some clearance in the middle for my intended use on a 3 gallon CO2 bottle. Instructions Tweaked the original SCAD in OpenSCAD. My print was on Type A Series 1, Repetier-Host Mac, Slic3r, solid (i.e. 100% fill), PLA.
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