Center finder with parallel segments

This is a simple center finder with teeth to allow to mark recesses on door edges.

I have one made of wood, with screws covered with heat shrink, and nuts in my workshop but has no teeth on the sides so i dont have the added funcionality of the parallel segments.

I want to give thanks to Modelsharing (https://www.thingiverse.com/thing:5182359) to give me the idea of the side teeth, I did it not with the idea of exact size segments in mm but more in a way to count teeth in both sides of the egde to create boxes with the same distance in the opposite sides, and teeth have the shape to fit the pencil tip.