Newest design: Our latest woodworker's edge rule simplifies your work by wrapping around the edge of your material and providing an accurate scale on both sides. Simply depress the spring-loaded index pin to lock the head at any full inch, setting your scribing guides for precise 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. A notch is located every sixteenth-inch along the blade. Just place your pencil in the notch and slide the head along the edge of your material to create a perfectly parallel line. Always stable: The square maintains a firm base when standing vertically, ideal for cabinet checks or machinery adjustments. Machined from aircraft-grade aluminum, the head is lighter than the cast iron heads used 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 both DIY and professional use, this tool delivers accurate lines, angles, and measurements for engineers, draftsmen, and carpenters.