Bosch Professional Tile and Square Layout Laser GTL3 PRECISION: Able to projects 90 degree lines for squaring . The Bosch GTL3s laser lines are positioned in front of laser base for easy centering over point and precise adjustment SHARP: Bright, highly visible laser lines raise from the surface to project over and travel past uneven surfaces or obstructions. Exclusive switchable 45 degree line helps verify proper positioning of square tiles between 0 and 90 degree DURABLE: This layout laser is IP54 rated to withstand tough jobsite conditions such as rain or dust. Comes complete with soft carrying pouch. Laser Diode : Class II 635 nm, = 1 mW SECURE: Features strong magnets on the bottom of laser tool to provide secure attachment on included positioning plate and other ferrous-metal surfaces ACCURACY: The GTL 3s Bosch laser technology allows users to be more productive with greater jobsite accuracy and precision