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 easy to store and the small size makes it great space saver nice addition to the traveling tool-box, which you can take to for different work The Multi-Function Foldable features 4 extremely clear and intuitive-acrylic vials, which obtain preciseness accuracy of 0.5mm / m providing wonderful and joyful for measurement and calibration of indoor and outdoor jobs aluminum profile processed by oxidation that avoids rust and eases-scratching Multi-function foldable, which can be folded as rectangle-shape block for daily storage and regular straight ruler for versatile jobs, Manufacturer: TFAOYS