Heavy-duty leveling base is fast and easy to set up and level. Locking pendulum to help prevent damage to internal components. Fine Tuning knobs: with the ability to fine tune adjust the level you will always have the level line where you need it GREEN LASER UNIT - We adopt Osram's laser unit, made in Germany, which is the best green laser unit in the word at present from Germany Munich; Green laser is 2 times brighter than red laser with the same light source, still accurate and clear under the sun, available for outdoor using. The rotating lasers can automatically self-level for inclined set-ups of up to 3°. Both vertical and horizontal point lasers can be positioned to set perfect 90 degree angles The laser level is a compact, practical option for basic cross line leveling work. Measuring at 1/4 ", the laser can fit comfortably in the palm of your hand. It has a hard plastic housing to protect the laser beams and pendulum leveling system within. The housing has a ribbed rubber casing that protects it from scratches while giving extra friction to make it slip resistant. Easy to use, saving a lot of time when you to do home-renovation projects, as installing floors, framing, laying out tile, and hanging pictures, interior decorating, etc.