Drew sommerfeld on MSN

Speed square tricks every DIY builder should know

In this quick shop tip, I walk through a few overlooked ways to use a speed square. I show how I mark perfect 90 and 45 ...
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How to Use a Speed Square for DIY Projects

We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Also known as a rafter square or triangle square, the speed square, invented by Albert ...