1、Multipurpose Ruler: This rafter ruler can meet various measurement needs, served as a protractor, woodworking compass, triangular ruler, frame ruler, etc., providing accurate measurement and marking. 2、Aluminum Alloy: This carpenter triangular ruler is made of excellent aluminum alloy material, with CNC fine processing to ensure high strength, oxidation resistance, no deformation, and has a long service life. 3、Measuring Range: The measurement length is 30cm (12 inch), with clear markings to ensure high accuracy and stability. Provide unit conversion table for length and angle to make your work more convenient. 4、Convenient to Use: With fine craftsmanship, this carpenter ruler has a flat appearance, allowing you to easily align the ruler with the wood, forming straight or diagonal lines proportional to the edges of the wood. 5、Portable and Practical: This triangular ruler has ergonomic design, comfortable and convenient to hold, can be hung and stored when not in use, suitable for various home renovation and woodworking projects.