Woodpeckers Stair Tread Template Tool helps you deal with out of square corners when you’re installing shelves, stair treads, and anything else that fits between two walls. We woodworkers live for “square”, but most homebuilders treat it as a mere suggestion. Then the cabinetmakers, trim carpenters and homeowners have to work with the results. Tools that look and work like our new Stair Tread Template Tool have been around for decades. We even make a fancier version ourselves. But the goal with this design was to build a tool that is fully self-contained…no pieces or parts to lose…with enough capacity for almost any shelving project and tough enough to survive construction sites.