Line Lasers

GLL 3-15 Professional

Line Lasers

Self-Leveling Three-Line Laser

  • Smart pendulum system self-levels and indicates when conditions are out-of-level
  • Projects one horizontal line and two 90° vertical lines separately or together to plumb, level, align or square many applications
  • 50 Ft. maximum operating range; for indoor use only
  • Line generator laser level is great for a variety of projects
  • Includes BM3 positioning device – with retractable feet, strong magnets and ceiling grid clamp for maximum versatility in all applications
  • Bosch measuring and layout tools are covered by a one year limited warranty with an additional year when you register your tool within eight weeks of purchase - for details, visit or call 1-877-BOSCH99
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GLL 3-15 Professional

Technical data

The most important data

Connected No
IP Rating IP 54
Laser Beam Color Red
Laser Diode Class II 635 nm, < 1mW
Leveling Type Self-Leveling, Up to 4°
Material Composite
Mount Threading 1/4-20
Operating Temperature 14° F / -10° C up to 104° F / 40° C
Range Up to 50-ft.
Weight 1 lb
Includes (1) GLL 3-15 Self-Leveling Three-Line Laser
(1) BM3 Positioning Device
(1) Laser Target
(4) AA Batteries
(1) Belt Pouch

GLL 3-15 Professional: Further information

Product Highlights

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.

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