Johnson Level Heavy-Duty Drywall Square features a unique rivet assembly that permanently bonds the head to the blade, ensuring the head remains square for the life of the product. Crafted from extruded aluminum with a 3/16" blade and head thickness, this drywall square durability and precision. The clear protective anodized finish enhances its longevity, while the screened thermal bonded black 1/8" graduations are large and bold for easy reading. Available in lengths of 48 inches and 54 inches, it is designed with English measurement type and 1/8 inch graduations, making it an essential tool for accurate drywall measurement and cutting. Model Number: JTS48HD