The Tolsen 35141 is a self-leveling cross-line laser level designed to help you achieve precise alignments for various construction and home improvement tasks. It projects a red laser beam with a wavelength of 635nm, allowing you to work at distances up to 20 meters with an accuracy of ±3 mm at 10 meters for both horizontal and vertical lines. You can choose to project these lines separately or together as a cross, covering an expanded angle of 120° in both directions. To make the tool versatile for different scenarios, it features an auto-leveling system alongside a manual mode that locks the lines, which is useful when you need to project a beam at a specific angle. For safety during movement, a transport lock prevents the internal mechanism from shifting. The device is built to withstand dusty and damp environments thanks to its IP54 protection rating and can operate in temperatures ranging from -10°C to +50°C. Powered by two AA batteries, the level provides about 8 hours of continuous operation, making it a reliable companion for a full workday. The package includes a positioning device equipped with strong magnets, which lets you securely attach the tool to metal surfaces for hands-free use. This makes it a practical choice for anyone from professional contractors to DIY enthusiasts who need steady, accurate references for tiling, shelving, or framing.