This Speedlite® 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 loves 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, & 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.