DOYLE™ 12 in. Laser Etched Aluminum Rafter Square is designed for fast, precise marking. Continuous scribe notches make it easier to make repeat markings – ideal for fast rip-cut setup on table saws. Measurements and unit conversions are laser-etched for easy visibility and precise marking. The durable aluminum frame is extra-tough to stand up to professional use. The large base makes the square easy to position and doubles as a saw guide.