Measuring tapes are equipped with many different symbols to denote different meanings, one of which is a tiny black diamond. But exactly what these little signs mean is a question many internet users ...
But for builders and skilled tradespeople, tape measures have dozens of equally useful applications in the home or on the job ...
On my tape measure there is a little diamond shape at 19⅜ inches, then another diamond shape at about 38⅝ inches. I have done carpentry work and know when you frame a house you use 16 inches on center ...
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