This is a kind of fine quality level instrument, 4D 16 lines for finer positioning, with self-leveling system, flexibility and stability. Provides accurate horizontal and vertical references for indoor construction layout and calibration, easy to use and versatile. Comes with an extension bar, made of thick aluminum alloy, 3 heights adjustable, suitable for most laser levels with 5/8" interface. Wall stud layout and partition installation. You can try. Features: Laser Level: Compact size, lightweight and portable, providing quick and convenient mobility and storage with the carrying box. Output 16 laser lines separately or simultaneously for finer positioning, with 3° self-leveling system, flexibility and stability. Using high-quality laser diodes and high-precision p conical mirrors, the emitted laser lines are thin and bright with high accuracy, and the brightness is adjustable. Equipped with self-test calibration function, automatic leveling ≤3°, but if the angle is greater than