Newest design: Our latest woodworker's edge rule simplifies your work by wrapping around the edge of your stock and providing an accurate scale on both sides. Just depress the spring-loaded index pin and lock the head at any full inch, so your scribing guides are set for accurate parallel marking. Easy line drawing: The blade features an exclusive saw-tooth design with scribing notches, similar to those found in our stainless steel precision woodworking squares. There is a notch every sixteenth-inch along the blade. Simply place your pencil in the notch and slide the head along the edge of your stock to create a perfectly parallel line. Always stable: The square maintains a firm footing when standing vertically for cabinet checks or machinery adjustments. Machined from aircraft-grade aluminum, the head is lightweight compared to cast iron heads on other brands of adjustable squares. Two styles available: Choose between 90-degree and 45-degree angle options to suit your needs. Suitable for: Ideal for DIY and professional use, this tool delivers precise lines, angles, and measurements for engineers, draftsmen, and carpenters.