Fukuda rotary laser level 360 12 lines 3D green beam laser leveler Self Leveling Horizontal Vertica 1 x 3D Red/Green Line Laser level set. Locking the pendulum allows the Cross Line Laser to better withstand vibration and Trauma incurred during transportation or if the units is dropped. Fukuda 12lines 3d laser level self leveling rotary +outdoor receiver attention there are at least 4 laser lines, it can not keep 1 or 2 laser lines.