Precise Measurement Our square protractor is laser-carving with clear metric graduations for precise, easy-to-read graduations up to 112 mm (4.41 inches). The woodworking ruler can measure 45-degree or 90-degree angles by simply sliding it. The angle ruler has the functions of measurement, correction, marking, etc. One ruler is multipurpose, which can effectively improve woodworking efficiency and save time. High Quality Material This woodworking square protractor is made of high-quality aluminum metal. It is rustproof, has high hardness, and good toughness,carpenter square is lightweight, easy to carry, and can be used for a long time.Easy To Use The multi-angle measuring ruler is detachable. When you screw on the screw, the woodworking ruler becomes a 3D three-dimensional measuring tool. When you dont need it, use the hex wrench 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 shape design can help you grasp and measure the required materials, suitable for three-dimensional objects, such as wood, metal pipes, marble, etc. This multi-functional woodworking measuring ruler is your indispensable good tool.What You Will Get The package includes a set of red square protractors, two hex screws, and a small wrench. The woodworking ruler size is 1127985 mm (4. 413. 113. 35 inches). If you are Unsatisfied with the product you received, please tell us, and we will solve the problem for you as soon as possible.