Green Beam Electronic Self Leveling Pipe Laser TS29507 It is self leveling which makes 421564 It is self leveling which makes it easier to set up and comes with 90 degrees split beam for alignment work The ChrisNik 3 Foot Extension Arm 1736ARM connects to the Pipe Mic II and provides construction and surveying professionals with an additional 3 feet for measuring pipe inverts or pipe diameters The Johnson Electronic Self Leveling Green Beam Pipe Laser is a reliable device used by plumbers and construction professionals for automatic alignment and installation of storm The laser is designed with a sleep mode that automatically turns the laser beam and display off from the remote