Reply by tenontim

I have an older, cheaper square, and I remember it required a little “tuning” to get it square. Mine had a burr or casting slag on one side of the slot where the ruler goes. I filed that down flush and it’s square now. I had also looked into a new square and couldn’t believe the prices. Doesn’t really matter to me what the name is on it, as long as it’s square.

-- Tim-- http://www.tmuli.com