You are buying an STL solid model for printing from 3d Printer. This wrench can be turned by a 4+" adjustable wrench or a 1/4" drive socket wrench.
Please see photos for the end result. Please contact me if there are any issues with the fitment and I will help as much as possible. You can see the results of the print from my monoprice mini in the photos.
This is drawn with the dimensions a perfect, tight fit so you will need to scale any additional "slop" for your machine into the STL before you print. I scaled in an additional .01" through cura.
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