Hexagonal screw

You can tighten Hexagon bolts easier with this part. Metric size can be schanged, mine is for a nut (2nd pic grey) with a diameter of 17,55 mm. My design is for a nut attached to a tube (2nd pic black) with a diameter of 10,9 mm. The space for tightening the nut was, in the enviroment I had to work in, very little. That is why I designed this part.