1、Foldable Design: The total length of this foldable level tool is 28 inch. When not in use, it can be folded into rectangular block for daily storage or into a regular ruler for various measurements. 2、4 Level Bubbles: This folding ruler has 4 easily readable level bubbles and supports measurement at 45° 90° 180°, achieving an accuracy of 0.5mm/m, used for measurement and calibration. 3、Durable Material: This level tool is made of excellent aluminum alloy, corrosion and oxidation resistance, the ABS connector and TPR end cover provide dual protection to prevent accidental falls. 4、Strong Magnet: This level tool is equipped with strong magnet on the side, which can easily adsorb to iron pipes, conduits, or other iron surfaces, with hanging hole at the head and tail ends. 5、Wide Application: This level ruler can be folded to any angle, bypassing obstacles and measuring multiple angles simultaneously, such as pipes, stairs, and corners, lightweight and practical.