The multi-function foldable features 4 extremely clear and-intuitive acrylic vials, which obtain preciseness accuracy providing a-wonderful and joyful experience-for measurement and calibration of indoor and outdoor jobs This hinged tool allows you to fold it to any angle to bypass obstacles and measure multiple angles simultaneously, such as for pipes, stairs and corners, folding or extending to use are available Multi-function foldable is-made of a-high-quality aluminum profile processed by oxidation that avoids rust and eases-scratching. Abs connectors and endcaps are the double-armor for accidental and long-term storage Multi-function foldable which can be folded as-a rectangle-shape block for daily storage and a-regular straight ruler for versatile jobs Multi-function foldable is-easy to store and the small size makes it-a great space saver. It is-a nice addition to the traveling-toolbox, which you can take to for different work, Manufacturer: SkyPOOU