Product Description Winner of the popular mechanics editor's choice award and the retailers' choice award of distinction, the Speedlite Square is an all-around crowd pleaser. This Square is an 8 inch lightweight version of the Swanson Speed Square, first developed by company founder Albert Swanson in 1925. The innovative Speedlite Square is everything you know and love about the Speed Square, but its especially great for use with siding and other delicate materials, since it wont mar soft finishes. This innovative tool combines 5 tools into 1: 1. Try Square, 2. Miter Square, 3. Saw guide, 4. Line scriber, and 5. Protractor. This model is constructed of lightweight, high-impact composite and is available in gray and high-visibility orange, and high-visibility yellow. The Speedlite Square also includes 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. From the Manufacturer The 8-Inch Speedlite square is formed from lightweight, high-impact structural composite and is available in matte gray, high-visibility yellow and high-visibility orange. It's basically the same as the one and only speed square but is also great for use with siding and other delicate materials, since it won't mar soft finishes. Plus, its 8-Inch size means it's ideal for marking cuts in 8-Inch siding. Look for the diamond 8-Inch size is great for siding Center line (C/L) guide for locating center of round stock Beveled edge for ease of reading 1/8-Inch spaced notches to use for scribing lines Constructed of lightweight high-impact structural composite material