Parametric Hex Nut Socket Tool

2020-06-14 16:30 UTC: made the handles configurable independently (being based on the nut size was not a good idea), and added the size of the nut on the underside of the part to help easier selecting of the appropriate size.

Slightly rewrote of the original thing so OpenSCAD-Parameters work, and added insets for the handles.

This is more or less about learning more about OpenSCAD, but if someone finds it helpful that's always a plus :)