The Klein Tools Laser Line Bubble Level LBL100 Projects A High Power Horizontal Laser Line and Spot Parallel to The Base That Reaches Up to 75-Foot (22.9 M). Use The Laser to Align Ceiling Tiles, Floor Tile, Studs, Wood, Saws, and More. Three Easy to Read Vials Identify Horizontal and Cross At 0-Degree Level and Vertical At 90-Degree. The Strong Rare-Earth Magnets In The Base Of The Level Attach to The Included Leveling Stand and Other Ferromagnetic Surfaces. The Top Features A V-Groove to Fit The Contour