Strait-Line 6041101 Laser Level 120 120 ft Work Area Ideal for home improvement Level plumb or any angle 4x brighter Ready.Aim.Fire. Remove backing. Position Laser Level on surface and turn on Use distance control pivot action to adjust line and visibility Use bubble vials for level / plumb or swivel in any direction Use index on base for angle layout To remove: Slowly pull 3M Command tab straight along the line of the wall or surface at least 12 inches until laser lever releases