Self-leveling lasers are tools used in construction and surveying to create a level reference line. They project a laser beam that automatically adjusts to ensure it is perfectly horizontal or vertical, making it easier to align objects accurately. This feature saves time and increases precision compared to traditional leveling methods. These lasers are commonly used for tasks like hanging shelves, installing cabinets, or aligning tiles. They come in various types, including rotary lasers and line lasers, each suited for different applications. Self-leveling lasers are essential for professionals and DIY enthusiasts alike, enhancing the quality of their work.