Design reference rules, it is specially useful while modeling and taking measurements of real world objects.
They are designed to fit inside Digital Calipers Case.
You might also like these:
https://www.printables.com/model/280190-thickness-reference-rules-wall-layer-05-to-5mm
Thank you for printing my model!
If you'd like you can buy me a coffee here: https://www.buymeacoffee.com/vitim
The author marked this model as their own original creation.