Product Description Empire Level 419-48 Heavy Duty Adjustable Drywall T-Square From the Manufacturer The Empire Level heavy duty adjustable T-Square 48-Inch aluminum drywall square is designed for general carpentry use. It is perfect for marking cut lines on sheets of plywood, OSB, drywall, and other board materials. The square is built for durability and easy use, with heavy-duty extruded aluminum blade and head with a clear anodized finish. The blade is 1/4-inch thick and marked in black with easy-to-read gradations in 1/8 and 1/16-Inch. The precision-machined head and blade lock together for a perfect 30, 45, 60 and 75-Degree angles, with the ability to adjust to any angle quickly, without disassembly. The square folds flat for easy transport. It is covered by a 5-year limited warranty.