The cross line laser lax is a high performance laser measureing device and guidance tool it operates by generating multiple laser beams vertically horizontally and beams for ceiling or floors the tool allows you to work directly on the laser lines making marking as you need to the laser can be swiveled 360 in the housing very bright fine and clean laser lines visible up to 20 m away includes stabila laser telescopic support lt 30 for variable positioning of lasers to a desired work