【High-quality material】 This woodworking square protractor is made of high-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 laser-engraved with clear metric graduations for accurate and 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 measuring, correcting, marking, etc. One ruler is multi-purpose, which can effectively improve woodworking efficiency and save time.【Easy to use】 The multi-angle measuring ruler is removable. 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 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