Line Lasers

GLL 55 Professional

Line Lasers

Self-Leveling Cross-Line Laser

  • VisiMax™ technology – delivers maximum line visibility in standard working conditions
  • Easy-to-use laser setup modes – projects vertical, horizontal and cross lines
  • Versatile job layout – lines can be projected separately or together for a variety of level and alignment applications
  • Smart Pendulum System – allows tool to self-level, and it indicates out-of-level condition
  • Secure laser transport – after switching off, pendulum is locked
  • Simple keypad operation – easily select among the layout modes
  • Magnetic L mount – strong magnets to attach to steel
  • Robust over-molded construction – built to IP54 dust- and water-protection standards
  • 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 https://rb-pt.io/PowerToolWarranty or call 1-877-BOSCH99
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Functions & key features

Laser Configuration: 1 Horizontal and 1 Vertical Line to align and level.
Working range of up to 50 Ft (15 m).
Self-levels, indicates out of level condition by blinking and locks when switched off for secure transport.
IP 54 - Protected against dust and splashing water from any direction.​
Works with mounts and tripods using a 1/4"-20 or 5/8"-11 thread mount.

GLL 55 Professional

Technical data

The most important data

Connected No
Height in 4.2 "
IP Rating IP 54
Laser Beam Color Red
Laser Diode Class II 630 – 650 nm
Length in 4.4 "
Leveling Type Self-Leveling, Up to 4°
Material Plastic Composite
Mount Threading 1/4-20, 5/8-11
Number of Beams 2
Operating Temperature 14° F / -10° C ~1 22° F / 50° C
Range Up to 50-ft.
Weight 1.08 lb
Width in 2.2 "
Works With Tripods, BT160, BT170HD, BT300HD, BT 150, Telescoping Pole System, BP350, Grade Rods, GR 16, GR500, Mounts and Positioning Devices, WM 4, BM 1, BM3, RM 1, RM 2, LB10
Includes (1) GLL 55 Self-Leveling Cross-Line Laser
(1) Magnetic Mounting Bracket
(1) Laser Target Plate
(3) AA Batteries
(1) Hard Carry Case

GLL 55 Professional: Further information

Product Highlights

The Bosch GLL 55 professional self-leveling cross-line laser features vertical, horizontal and cross-line modes and can project two lines independently or together, for a broad array of alignment and leveling applications. It includes the Bosch-exclusive VisiMax™ technology, which allows for outstanding line visibility in standard working conditions. VisiMax constantly monitors the laser's temperature so the diodes are always driven to maximum line brightness, while protecting the laser diodes from overheating. The laser lines are visible up to 50 Ft., with an accuracy of ±1/8 In. at 33 Ft. The Bosch smart pendulum system self-levels and indicates out-of-level condition, to help ensure an accurate layout. It locks the pendulum after the laser is switched off for secure transport. The included magnetic L mount provides strong magnets to attach to steel studs and a free-standing mode with retractable feet.

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