Increase the accuracy of virtually every construction layout task with this SuperSized folding Square. Instead of using the old 3-4-5 triangle method of establishing a right angle (a task that generally requires two people), simply unfold the A-Square. Accurate to 1/32" in 4 feet, it helps you quickly verify squareness when laying out floor plates, ceramic tile, kitchen cabinets, and more. A-Square is made of aircraft quality aluminum for durability and light weight, and features a patented positive self-locking mechanism for easy erection and storage.Made in USA.