The Johnson Aluminum Framing Square is everything a builder needs to get the work done quickly, efficiently and accurately. The aluminum framing square includes graduations in 1/8 in., 1/10 in., 1/12 in. and 1/16 in., as well as octagon scales, rafter tables, brace tables and board foot tables, making it useful for any number of different jobs. This framing square's graduations and tables are also permanently stamped, so you'll never worry about them fading or wearing.