The DW085K 5 Beam Laser Pointer includes a single lever power switch locks pendulum in the off position for added durability and a built-in magnetic pivoting bracket, which mounts easily on metal surfaces.Applications: Steel Track Installation and Layout Curtain-wall Installation Floor to ceiling transfer General leveling over long distances Includes: Kit Box 4 AA Batteries Self-leveling point laser is accurate to ±1/4" @ 100' Single lever power switch locks pendulum in the off position for added durability Micro adjust knob for precise alignment of 90° intersecting lines over greater distances Built-in magnetic pivoting bracket mounts easily on metal surfaces Integrated track clearance enables users for fast and easy bottom and top track installation Overmolded housing helps maintain calibration under job-site conditions Focused laser beam keeps dot size small over longer distances for improved accuarcy and visibility