This Speedlite Level Rafter Square is an 8 in. lightweight version of the Swanson Speed Square, first developed by company founder Albert Swanson in 1925. The innovative Speedlite Level Square has all of the same features as the Speed Square but boasts additional functions for 7 tools in 1: 1. Try Square, 2. Miter Square, 3. Saw Guide, 4. Line Scriber, 5. Protractor, 6. Level, & 7. Angle Finder. This model is constructed of lightweight, high-impact composite and is available in gray and high-visibility orange. The Speedlite Level Square also includes markings for using the Swanson 1-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. Material: Aluminum.