The STANLEY® Cubix™ — model STHT77340 — is a cross-line laser, ideal for do-it-yourself and light residential construction. Cross-line lasers are used for a variety of jobs, from leveling chair rails to hanging cabinets. According to the company, the Cubix laser has a simple-to-use switch with only three settings: off, manual, and auto-leveling. By projecting bright horizontal and vertical lines onto flat surfaces, users can easily level what they are installing. In the auto-leveling mode, the Cubix cross-line laser will automatically level using an internal pendulum. If the angle of the tool exceeds 5 degrees from level, the laser will shut off and an indicator will light up, signaling it has exceeded the 5 degrees in which it is able to self-level. The Cubix has up to a 40-foot range with an accuracy of +/- 5/16 inch.