Aluminum alloy material, rust and corrosion resistance, oxidation resistance, high hardness, long life and clear scale, high accuracy and wear resistance Double-sided double scale, readable angle number, and metric measurement scale Humanized design, matte texture, thickened design Multifunctional design: It can be used not only as a triangle ruler, but also as a multifunctional angle protractor, suitable for a variety of measurement tasks such as construction, carpentry, frame construction, etc., increasing the practicality of the tool, Manufacturer: JTRRDDEW