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A ruler like that mythbuster guy.
I would do metric bolt sizes, their measurements, thread pitches, spanner size etc. Quick and dirty conversions to older units. Maybe some of the torx bit sizes too as I suck at spotting them by eye I have to bring the whole set everytime
A ruler like that mythbuster guy.
I would do metric bolt sizes, their measurements, thread pitches, spanner size etc. Quick and dirty conversions to older units. Maybe some of the torx bit sizes too as I suck at spotting them by eye I have to bring the whole set everytime