Review on Duratec Precision Positioning Squares Set by Jay Ngo

They are great. I compared them to the squares on Starrett's car. They are within 1/128th of their length inside and out. This is more than enough for working with wood. If you want to fine tune them you can always use a scraper or plane to make them perfect. I didn't stress test her to see what force it would take to bring her out of her true state. All in all a very solid construction. I recommend them to help you put your projects together nicely and also to keep crush marks on your piece.