The Irwin Tools 1794449 Steel Framing Square 16-Inch X 24-Inch features Permanent deep stampings for durability. The framing square also has multiple scales: 1/8-Inch, 1/10-Inch, 1/12-Inch, and 1/16-Inch. The framing square features Rafter tables, brace and octagon scales, and Essex board measuring.