1、[Versatile Tool] This triangular ruler serves multiple purposes, such as measuring, aligning, and marking, easy to use, suitable for various tasks in woodworking and layout projects. 2、[Sturdy Aluminum Alloy] Crafted from sturdy yet lightweight aluminum alloy, this woodworking square protractor offers durability and a comfortable grip for extended use. 3、[Anodized Design] The woodworking square undergoes anodizing process, with high hardness and wear resistance to maintain accurate markings. 4、[Thickened Design] The ruler is thickened and can prevent shifting during use, reducing errors, ensuring accurate measurements in woodworking and layout applications. 5、[Ideal for Professionals] Suitable for engineers, carpenters, and decorators, ideal for measuring circular materials, three dimensional workpieces, square wood, pipes, and more.