1. This ruler is made of 201 stainless steel, 1mm thick with wear resistance and corrosion resistance, high hardness, etc. Not bendable but a little flexible, not easily damaged, and can be used for a long time.2. This metal ruler is suitable for carpenters, engineers, architects. Convenient for drawing, measuring devices, construction projects, crafting, etc.3. Markers start at "zero" on the edge of the ruler. The rulers are marked in millimeters and inches, for easy drawing or measurement.4. The metric and inch ruler has double-sided reading with smooth without burrs, big and clear numbers, and an accurate scale, is easy to read, and suitable for amateurs and professionals. Designed with a hole for hanging and storage.5. The ruler is with squared-off angles, please pay attention to avoid scratches to your hand.6.