Compare Quick view Irwin 16" x 24" Aluminum Carpenter Square Irwin Tools MSRP: Now: $20.83 Was: Irwin 16" x 24" Aluminum Carpenter Square Permanent deep stampings for durability Multiple scales: 1/8, 1/10, 1/12, and 1/16 Rafter tables, brace and octagon scales, and essex board measure 16" X... MSRP: Now: $20.83 Was: Compare Quick view Qty in Cart: 0 Price: