It's supposed to be "square", well because it's a square, but it is not square; it's out of square probably .040" per foot, which is terrible.I won't be surprised if the manufacturer comes back with some excuse like "For this price, you cannot buy a precision square." But it's not even close to being a useful tool.look at the photos and see how the lines diverge in just 7", that gap is close to .040, so take that out to 12" and divide by 2, and the gap will be around .04 out.I should have paid attention to others who said it wasn't square, because it's not.
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