The stabila lax400 lax400 multi line laser rotates horizontally through 360 for line marking and levelling around an entire room it has a manual alignment function where two lines form a 90 angle with fine adjustment the laser lines can be pivoted to a target position without losing the position of the plumb line dot the laser has a vertical beam which is directed downwards and is clearly visible through the adjustable feet above the two vertical lines intersect precisely over the plumb line dot