Multi-Angle Measuring Ruler has 4 adjustable side rulers. You can use it to measure any desired angle or shape accurately by tightening or loosening the screws. The rulers are made of durable aluminum alloy that resistant scratching and corrosion. Scale number on the ruler is etched by laser, making it clearer and more precise than the painting ones. It also comes with protective bag. This excellent portable tool is easily folded and carried. No matter you are a professional builder, a craftsman, a carpenter, a designer, an architect or an amateur, you definitely need such a practical tool for your next project!