The combination square was invented in 1878 and has been copied countless times over the last 140+ years. But until now, no one has done much to make the combination square better. Woodpeckers product development team wanted more than just a “me too” product. They built features into our in-DEXABLE Combination Squares you won’t find in any other combination square at any price. Features like laser-accurate scribing guides, positive indexing at every full inch, a sliding head support and accurate, laser-engraved scales. To round out the system there’s a Double Square head and we’ve recently added a new Centering Head and a new Protractor Head, all with the same precise full-inch indexing feature.