Swanson 12.25 in. L X .875 in. H Aluminum Speed Square

BIG 12® SPEED® SQUARE W/PLAIN MARKINGS, BLUE BOOK "The Big 12® Speed® Square is a 12-inch version of the Swanson® Speed® Square. This innovative tool combines 5 tools into 1: 1. Try Square, 2. Miter Square, 3. Saw Guide, 4. Line Scriber, & 5. Protractor. The Big 12® Speed® Square is die-cast for durability and accuracy. Made of heavy-gauge aerospace aluminum alloy, it is built to last. This model includes the Swanson® Blue Book for Roof and Stairway Layout and also features markings for using the Swanson® One-Number® Method of rafter layout. The Swanson® Speed® Square is our most popular product and remains the most trusted square of its kind. Look for the Diamond® cutout for genuine Swanson® products.Note: this item does not include the layout bar or corresponding hardware used with the S0107 Big 12® Speed® Square."