I was just at a trade show a Japanese company had rulers with the inch markings in 10ths of a inch. The American reps found it hilarious.
I have a similar one on my desk. Inches by 10ths and 16ths and metric. Use it for getting real world objects into 3d models. A few quick measurements make it obvious which scale will be fastest.Umm why? Maybe uncommon for a carpenter... here are a couple on my desk.
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That's me looking for a trailer...LMAO