Terms of the Trade: What Is a Carpenter's Square?

A carpenter’s square, also known as a steel square or framing square, is a lightweight measurement tool with a long and short arm that form an “L” shape and meet at a 90 degree angle. As you can probably guess, this tool allows a carpenter to lay out proper measurements for anything with edges. However, you don’t have to be a carpenter to benefit from this handy tool—anyone who works on home improvement projects can use it to get accurate measurements.