RoboToolz RT-7715-2 Automatic Leveling 2-Beam Level and Plumb Crossliner Super high visibility beams with 140 degree vertical and 120 degree horizontal fan angles provide amazing line lengths Precision, vertical and horizontal lines operate simultaneously or independent of each other Self leveling or take out of self-leveling mode and lock line in place allowing you to set unit at any angle The visual (blinking laser beam) out of level indication signals if the unit is out of level. Mulitpurpose attachment accessory allows 45 degree tilt/swivel in any direction. Strong magnets, tripod mount, and straps allow for attachment to a variety of surfaces