This is accurate enough for my purposes. No gaps were found when compared to a known good square. When checked with an electronic square, it reads 89.95-90.00 degrees. When I put it on a granite countertop it wasn't flat. I clamped it in a vise to straighten it and it was surprisingly difficult to straighten by hand. There is a little spring in the metal, which is good. . The edges are rough. He left a small wavy pencil line. So I rubbed it down with medium grit sandpaper to remove the sharp edges. The anti-corrosion coating is a bit thick, but it's ok if you remove it from the edges of the gusset and blade. 1/2 star for slight creases and slightly rough edges that can be corrected. Featured!
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