Trimble’s Spectra Precision GL412 Single Grade and GL422 Dual Grade offer horizontal level, grade and vertical plumb setup with no manual leveling and they send a continuous, self-leveled 360-degree laser reference over an entire work area. Both lasers feature a two-way, full-function remote control with built-in backlit grade display allowing the operator to use both the remote control and laser keypad – including grade reverse on both axes – up to 330 feet from the laser. The GL412 and GL422 lasers are compatible with both the company’s HR550 laser receiver at a 2,600-foot operating diameter and with its CR600 Laser. The lasers self-level in both horizontal and vertical modes in a wide variety of general contractor applications, including grading and excavating, vertical alignment and plumb for anchor bolt installation, tilt-up and curtain wall plumbing, concrete sections with runoff for sports fields, tennis courts and driveways, steep slope road embankments and ditch banks and parking garages, ramps and drainage.