Features: Quality material: This woodworking square-protractor is made of quality aluminum. It is rust-proof, has high hardness and good toughness, is lightweight, easy to carry, and can be used for a long time. Accurate-measurement: Our square-protractor is lasers engraved with clear metrics graduations for easy-to-read. The woodworking ruler can measure 45 degree or 90 degree angles by simply sliding it. The angle ruler has the functions of measuring, correcting, marking, etc. One ruler is multi-purpose, which can effectively improve woodworking efficiency and save time. Multifunctional Design: With perfect 45 degrees and 90 degrees angle, this positioning ruler is convenient for you to position locate, line drawing, length measure, angle measure and, etc. It can be as woodworking measuring tools, angle ruler, dimensional measuring tool, marks scraper. It"s a useful carpenters accessories. Easy to use: The multi-angle measuring ruler is detachable. When you screw in the screw, the woodworking ruler becomes a 3D three-dimensional measuring tool. When you don't need it, use the hex key to remove the screw, and you can get a square-ruler and a miter triangle-ruler. Wide Applications: The multi-angle measuring tool for carpenters, engineers, DIY enthusiasts, decorators, construction workers, etc. The hollow-shaped design can help you grasp and measure the required materials, suitable for three-dimensional objects, such as wood, metal pipes, marble, etc. This multifunctional woodworking measuring ruler is your good indispensable tool. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: aluminum alloy Package List: 1 Set Multi-Angle Measuring Ruler