Product information

The Bosch GLL 3-15 Self-Leveling Three-Line Laser can help with alignment, leveling and squaring needs. Bright laser lines can be used in self-leveling mode or locked in manual mode for sloped applications. The unit features an audio alarm to alert that the tool is out of range in self-leveling mode so you can build with confidence. The GLL 3-15 is versatile to use thanks to the BM3 positioning device. This included device allows the user to position the tool on any flat surface, attach it to metal surfaces or clamp it in place for ceiling grid applications.


  • One horizontal line, two vertical lines at 90º to each other - for level, align and squaring applications
  • Smart pendulum system - self-levels and indicates out-of-level condition; switch slider to lock for transport
  • Three line selection modes - projects three lines independently or together for a wide array of level/align and squaring application
  • Includes BM3 positioning device - with retractable feet, strong magnets and ceiling grid clamp for maximum versatility in all applications

Technical data

3/16" at 30 feet
Range (up to)
50 feet
Leveling Type
Mount Threading
4 x AA Batteries
Find it at Lowe’