High-quality materials: The multi-angle measuring ruler is made of high-quality 2.55 mm aluminum alloy, with durable knobs and bolts, and the surface is coated with a black oxide layer. The measuring tool is rust-proof and will not rust. This universal angle The ruler is stronger and more durable than the plastic ruler. Under normal storage, it can last a long time in your toolbox. Laser engraving: This angle measuring instrument is scaled with special laser engraving technology. It is very wear-resistant and can be used for a long time without worrying about corrosion. They will not wear out and disappear due to the use of too long scale, and the digital scale will remain on the ruler forever. Easy to carry: The muti-angle measuring ruler is an excellent portable tool, easy to fold, save space and easy to store, you can even put them in your clothes pocket and carry them at any time, or put them in your backpack, a small Pocket can hold them.