Guide / stop for Steel ruler - parallel lining

I focused on functionality, ergonomy and good guiding and sliding when drawing. Ideal for home maker, wood workers. 

 I often need to draw long parallel lines or draw right angles.  . That is why the front part is also rounded and wider to move better. The screw is optimized for printing (semi-circular profile). In the printing profile, the screw is also selected and printed with 15% gyroid compared to the body, which only needs 10%. The perimeters are identical 3. I recommend printing from PLA. Strength and durability are sufficient. 

 Print at 0.20 layer width, only then will you be guaranteed more accurate dimensions and the radii will look better.