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1

Personally I love folding rules, but I would never use one with the measurements on the inside like this because it precludes including the main feature I use them for: The sliding extension. The sliding extension changes the folding rule from a measuring device into a story-stick that can hold a dimension without the need to remember a measurement. I use ...


2

Folding rules come in two main styles: inside read (also called "English measure") and outside read ("American measure"). I've never found a good, verifiable, explanation for the difference. There is a rumour (that I think is unfounded) that the American measure was standardized in simple opposition to the English measure. That seems overly perverse, even ...


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