The Crescent Lufkin® 2-in-1 Extendable Layout Tool & Speed Square makes woodworking and framing quicker and easier. It's made from solid aluminium with laser etched markings and a quick access thumb lock. The tool and square are both lightweight, strong and corrosion resistant. The square itself acts as a continuous edge for scribing and marking, and with its unique patented folding feature, it allows you to extend the square from 150 to 300mm.