The carpenter's square (also known as a rafter square but most commonly referred to as a Speed Square, a trademark of the Swanson Tool Co.) might be the most ...

A speed square is a versatile and essential tool that every carpenter, woodworker, and DIY enthusiast should have in their arsenal. This triangular-shaped measuring tool is packed with functionality ...

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Speed squares are a helpful saw guide for cutting 45- and 90-degree angles. The plastic squares are thicker than most metal ones, making them a good fence for the shoe of a circular saw to ride along.