How to measure and mark accurately using a combination square

Learn how to measure accurately and make reliable layout marks using a combination square.

A combination square is one of the handiest measuring and layout tools that anyone who builds can own. Of course, you can use it to lay out 90° and 45° angles. But there are a lot more great things you can do with a combination square to increase your measuring accuracy and to reduce the chances for measuring mistakes. Here are just a few.