This self-leveling point laser is accurate to 1/4" per 100'. Its single lever power switch locks pendulum in the off position for added durability. A built-in magnetic pivoting bracket mounts easily on metal surfaces. The laser also include an integrated track clearance to enable users for fast and accurate bottom and top track installation, an overmolded housing which help maintain calibration under job site conditions, and a focused laser beam that keep dot size small over longer distances for improved accuracy and visibility. Ideal for steel track installation, curtain wall installation, locking overhead anchor locations, plumbing of door jams, floor to ceiling transfer. The kit includes 4 AA batteries and a case. 3-Year limited warranty.