Ingco 3 Pieces Spirit Level Set.

Function: Spirit levels, also known as bubble levels, are instruments used to determine if a surface is precisely horizontal (level) or vertical (plumb). Components: They typically consist of a frame (plastic, wood, or metal) containing a glass tube, or vial, filled with a liquid and an air bubble. Operation: The position of the air bubble within the liquid-filled vial indicates the levelness or plumbness of the surface being measured. Ingco Set Features: The Ingco set is described as high-quality, durable, and suitable for a variety of tasks, including construction, woodworking, and DIY projects. Specific Features (as seen in image and search results): Accuracy: Indicated as 1mm/m, meaning for every meter of length, the deviation from true level is no more than 1mm. Vials: Features two vials, typically for horizontal and vertical