The Spectra Precision® LP51 5-Beam Laser Pointers is designed to handle a wide range of interior construction applications. This rugged red beam laser pointer offers several benefits to general and interior contractors, electricians, plumbers and a variety of tradesmen. The LP51 projects 5 red points: one point up, one down and three horizontal points 90 degrees to each other. Automatic self-leveling and plumb assures accuracy and fast setup One person installation of walls, doors, ceiling track and other overhead fixtures without the need for a plumb-bob Fast, one person 90° layout of rooms, walls, tile, carpet squares and fixtures Accuracy of 3/16 inch at 50 feet (3mm @ 10m) Working range up to 100 feet (30m) Dust, water and shock-resistant for improved reliability and minimal repair costs Durable unit with protective rubber over-molding withstands a drop of up to 3 feet (1 m) onto concrete and still maintains consistent accuracy Compensator lock for non-level applications and secure transport Exclusive 3-Year instant exchange warranty Ships complete in a soft pouch with magnetic mounting accessory, target, 2 x AA batteries and multi-language user guide