This square is very accurate as tested with my Brown and Sharp machine square. It also reads very well with white writing on a blue laser. It has been CNC machined so the edges are pretty sharp. I felt a little uncomfortable holding it with my bare hands, so I chamfered the edges a bit with a Swiss file. This of course broke the blue anodized finish, leaving the edges with a shiny aluminum finish. It actually looks pretty good. But I want them to break the sharp edges before anodizing. This will complement the already very good product.
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