Spectra Precision  HV401 The Spectra Precision HV401 is a highly visible laser with exceptional accuracy. This laser can be used in both horizontal and vertical modes for a wide array of jobsite applications. The HV401 is easy to set up, learn and use, and gives you automatic, self-leveling one-person operation, while retaining the rugged and tough design of all Spectra Precision lasers. Designed to work with common construction materials and infrastructure such as drywall, wall anchors, and reference marks, the HV401 features a multi-use mount for ceiling installation and drywall framing. The HV401 laser provides a permanent, hands-free reference for hanging ceilings in large rooms so you can complete the job with one setup. HV401          $ 1925 Spectra Precision  HV301 The automatic, self-leveling Spectra Precision Laser HV301 is an economical laser with exceptional versatility and visibility. Whether your job site is indoors or outdoors, the HV301 is capable of handling a wide variety of horizontal, vertical and plumb applications. Its high-visibility beam enables 90-degree simultaneous rotating and plumb/perpendicular references. HV301          $ 1335 Trimble  HV101 The Spectra Precision HV101 is a professional leveling tool with an economical price tag. This laser’s exceptional versatility allows it to handle a wide variety of horizontal, vertical and plumb applications. The HV101 is easy to set up and use, while simple controls allow operators to carry out many functions with “one-touch” commands. This laser transmitter is automatically self leveled in the horizontal and vertical planes and sends a continuous 360-degree laser reference over the entire work area. HV101          $ 650