Accurate measuring tool: Triangle ruler ensures the accuracy of measurement and is an essential tool for woodworking and other projectsSturdy and wear resistant: Triangle ruler protractors is made of high strength aluminum alloy, which is sturdy and wear resistant to ensure long term useClear scale design: The 90 degree angle meter has clear and accurate scale, which are easy to measure, mark, and read, enhancing its usability and convenienceWide application: Aluminum alloy woodworking triangle ruler measuring tool is suitable for carpenters, engineers, workshops, industry, and home usePortable size: Metal carpenter square is small in size and light in weight, easy to carry and store, and is an ideal tool for outdoor measurement Specification: Material: Aluminum alloy Size Chart: 18.5 cmx18.5 cmx2.2 cm/7.28 inchx7.28 inchx0.87 inchHypotenuse 25 cm/9.84 inch Package Includes: 1x Carpentry Triangle Ruler Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.