Introducing biggest evolution of the Swanson Speed Square in almost 100 years - The Speed Square PRO. This revolutionary layout tool born out of the true legacy tool the Speed Square is packed full of new features and has the same reliable features you have always counted on from the Swanson Speed Square making layouts even faster and easier. The diamond cut out bridge that adds support and the famous trademark Swanson Diamond Cut Out at the 3 in. mark. Beveled edges get the square closer to the working material resulting in more accurate Top Cut measurements. High-visibility black gradations with a non-glare matte finish for easy reading in any lighting conditions. Heavy-gauge billet aluminum alloy construction is die-cast for increased accuracy over laser-etched and extruded stamped rafter squares. Useful for determining and marking angles and making square cuts on boards. Includes pocket-sized Swanson Speed Square PRO Blue Booka comprehensive reference guide with our One-Number Method to help workmen make correct angle cuts for any pitched roof. Multi-tool: Try square miter square saw guide line scriber and protractor. For what it does the Speed Square belongs on every tradesman's tool bench. The Speed Square PRO starts with all the incredible features of the original Speed Trim Square then takes it up a notch. From a new 22 angle coming off of the pivot for quick layouts to an additional 5 In. diamond mark for working with 26 material. It also has 1 In. edge used to measure the width of 2X material for quick framing. The Speed Square PRO is the worlds most proficient tool designed for the true professional.