Also known as a rafter square or triangle square, the speed square, invented by Albert Swanson, has been making woodworkers’ lives easier since 1925, thanks to its versatility and affordability. Now, ...

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.

A Speed Square, also a rafter or triangle square, covers many uses. Understand how to use a Speed Square and how it can be used in various home improvement DIY projects. Here are a few of those ...