To be successful. carpentry projects must be square, level, and plumb. Square means that corners are 90 degrees. Level is always gauged by a device, such as a carpenter's level, but level does not ...
Wesley Treat on MSN

How to square a square

This guide breaks down the simple method for checking whether a square is truly square. Using basic tools, you learn how to ...
Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? The Speed Square was designed in 1925 as an aid to carpenters framing homes, and ...