
The square was coated with a light, easy-wipe lubricant, in a sealed plastic bag, in a plain white cardboard box that looked waxed or otherwise inside for protection from moisture. For testing, all I could do was place it on a laminated desktop and draw a line, then flip it over and draw another line about 1/16 inch from the first. The two lines were parallel to my eye. Then I tested it on other places. , some things are known, some things are missing, some things I believe, he agreed. It is sufficient for setting up my woodworking machines and is a bargain. Update: April 2014 -- The area has been in use for almost a year and has not rusted or tarnished. As far as I can verify, it's still square. My only regret is that I didn't buy a 6" to go with it.

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