Empire Level 1240 16-Inch by 24-Inch Fat Boy Heavy-Duty Aluminum Framing Square. Made of 3/16-Inch thick heavy-gauge aluminum 1/16-Inch, and 1/32-Inch graduations. 50% thicker than standard squares and resists bending. Aluminum construction will not rust or corrode.-Inch graduations, numbers, and rafter tables are deep stamped for long life.