I've designed this model because I needed a tool more precise than my L-shaped ruler, i.e. with a tighter measurement resolution, to draw lines parallel to the boards' edges in my DIY carpentry works.

This model has a resolution of 1 mm, from 1 mm to 40 mm - it is in two versions, with 1 and 2 mm wide holes for the pencil.

I recommend to use a resin printer, but a filament printer should do the work, too.