Multi-functional folding level ruler, adjustable in multiple angles, suitable for decoration, carpentry, and installation and leveling of air conditioning brackets. Multi-section hinge structure, capable of measuring at corner irregular positions. It can be unfolded for use and is compact and portable when folded. Equipped with a level bubble, the observation is intuitive. Easy to store. Suitable for on-site construction and DIY measurement tasks at home.

The product adopts a multi-section foldable structure. The sections are connected by fastening rivets. After adjustment, it can maintain the set angle and does not require constant handholding for support. The main body shell has reliable strength and is unlikely to deform, ensuring that the measurement reference point does not shift. The body is equipped with a level bubble, which can separately detect the horizontal and vertical states, allowing for a clear observation of whether the measured object is in a flat and aligned position, assisting the operator in completing the alignment and leveling work.This foldable multi-functional level ruler is specially designed for decoration construction, woodworking operations, air conditioning installation and other scenarios. It features a multi-section hinged folding structure that allows for flexible adjustment of the measurement angle, addressing the needs for measuring length, irregular corners and narrow spaces. It is an essential measuring tool for manual workers and home decoration construction personnel.

The folding and storage design is a major feature of this tool. When unfolded， it can achieve large-span multi-point measurement. When folded， it has a small volume， making it convenient to store in tool bags or tool boxes. It can be carried when going out for on-site construction without taking up space， and can be conveniently carried to various work sites. It can be adapted to various complex conditions， such as door frame leveling， cabinet installation， air conditioning unit bracket positioning， wood frame assembly， ceiling keel alignment， as well as common straight sections like corners and steps that are inconvenient to measure with ordinary level rulers. It can perform measurements on the surface of the object.

The hinge position can be adjusted as needed for positioning， enabling multi-angle comparison of multiple folded corners and non-linear components. There is no need to repeatedly move multiple measuring tools. The surface layout is clear， and the observation bubble is simple and direct. The learning curve is low， and even beginners can quickly understand and read the numbers to complete the basic leveling work.

During daily use， it is necessary to avoid dropping or heavy hitting， as this can cause the horizontal bubble to shift or the hinge part to loosen， directly affecting the measurement reference effect. After the work is completed， clean the surface dust and debris， and store it in a dry environment. If the hinge part becomes loose， you can moderately adjust the rivets to ensure the stable folding positioning. It is suitable for use by home decoration technicians， carpenters， air conditioning installation personnel， and DIY enthusiasts. The multi-angle folding design expands the usage boundaries of traditional level rulers and brings convenience to various leveling measurement tasks.