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.

One simple adjustment to true up your combination square makes a world of difference in getting the sharpest, straightest lines while woodworking. The post Combination Square Hack: This Is the ...

A combination square is a little different from a speed square because it has moving parts. The general structure is composed of a metal ruler blade with a groove down the center and an L-shaped ...