The Woodpeckers in-DEXABLE Combo Square features a 12-inch blade and stands out with laser-accurate scribing guides, positive indexing at every full inch, a sliding head support, and precise, laser-engraved scales. It’s a versatile tool for woodworking and layout tasks. The complete set includes four heads (Combination, Protractor, Center Finder, and Double Square) and three blades, all neatly organized in wall-mountable Rack-Its. You won’t find these unique features in any other combination square!