Even when I worked in countries that were quote unquote exclusively on the metric system 90% of all tape measures found in the stores were dual measurement with both metric and inches. When dividing things into equal parts especially when an odd number with a non-equally divisible total dimension. I would find guys flipping their tapes around to read from the infernal side most would just count the number of lines since they had no idea what 1/4 or 1/16th was. When doing multiple hole layouts on metal with scribe lines, I cautioned them whenever possible to always use a zero-point start. this would prevent an escalation or accumulating total error. usually retaining a .010" or .25mm total error.

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