This ruler helps you marking a line in a desired distance from the edge of a workpiece. 

It allows you to choose a distance between 2 and 100 mm from the edge. Each 5 mm is highlighted, each 10 mm is labeled. 

It should be printed with a 0.4 mm nozzle or finer and a maximum layer hight of 0.2 mm. It works best, if you add a color change after 0.6 mm hight. I recommend using PLA or PETG for print it. Support is not neccessary.

The design was inspired by the model from Zdrapek (https://www.printables.com/model/883816-tracing-ruler), but I made it completeley new from scratch, because I found it difficult to print with a 0.4 nozzle.