Inner Gauge - MaxDia-284mm
This is a basic measuring tool.
In the "files" you can found the ".step" of every piece if you want to edit with software that cant handle mesh files.
For this design I use Solidworks, and to print i used an anycubic i3-mega
Recommendations:
-Print the arm piece with a lateral face as base.
-Print the bolt and nut in vertical without support (The bolt whit the square side as base)