We researched at least 20 combination squares and tested six, and we think the Irwin 1794469 12-inch Combination Square is the best way to mark a straight line.

Regardless of your skill level, a combination square is an essential piece of a woodworker's toolkit. Combination squares might seem like an advanced tool for professionals only, but they’re ...

Regardless of your skill level, a combination square is an essential piece for a woodworker. Here are our recommendations for the best combination square.