Yet Another Bolt and Nut Ruler - ISO (metric) / With magnets!

Yet another bolt and nut measuring tool.

Made my own iteration to have a public domain one - those things should be so ubiquitous to be available in dollar stores!

My design goals:

• Small and handy, but usable up to M8 (not everybody uses M10+)
• Able to measure commonly used metric blot lengths
• The texts should be large and easy to print, even with larger nozzles
• The slots to check sizes should be easily usable - even when taking out nuts
• Add some holes on the back for magnets (4x φ6 t3 neodymium magnets)
• Add fillets on the bottom to prevent problems caused by the elephant foot effect
• Use parametric tolerances - everybody has a printer with different tolerances (fusion360 parameters)

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Remix sources are only used for inspiration, I made everything from scratch. (so that the license can be public domain)