Line lasers are tools that project a straight line of light, often used in construction and surveying. They help ensure accuracy when aligning objects or measuring distances. The laser creates a visible line on surfaces, making it easier for workers to see where to place materials or make adjustments. These devices can be manual or self-leveling, with some models featuring multiple lines for more complex tasks. Line lasers are commonly used in conjunction with other tools, such as tripods and laser receivers, to enhance precision in various applications, including interior design and landscaping.