How to Check a Square for Square!

Whether it's speed square, combination square, or framing square, you count on the tool to accurately measure 90-degree angles. But, how do you know if the square is square?

Easy!

Place one leg of the square or its reference edge along the straight edge of a board or piece of plywood. Mark a line along the other leg, then flip the square from side to side and place it along the straight edge once again. Align the other leg about a 1/4" (or cm) from the line you just made, and draw another line. If the lines are parallel, your square is fine!

If not, it needs adjustment. In the case of a framing square, check out this episode where we show you how to make the adjustment:

https://youtu.be/hvVK2lOirBM

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JUST DO IT YOURSELF!