Bosch GLL40-20G Self-Leveling Cross-Line Laser

If you’ve ever used a laser level in broad daylight, then you know it can be hard to see. For your dim view, the Bosch GLL40-20 G green laser is the solution.

The Bosch GLL40-20G Self-Leveling Cross-Line Laser projects visible green laser lines, which are up to 2X brighter than standard red beams. The cross-line laser is also equipped with a Smart Pendulum System allowing for automatic self-leveling and indication of out-of-level condition, as well as pendulum lock for safe tool transport

Using the same self-leveling technology as the GLL3-300, just get the Bosch GLL40-20G within ±4 degrees of plumb and level, and the laser will complete the task. The laser comes with a soft pocket for storage and a handy little mount that can be clamped on a variety of surfaces.

You have several options for positioning the Bosch GLL40-20G. It can be placed on a table, workbench, or any other surface that is fairly flat. If that’s not the height you need, don’t worry. A 1⁄4-20 female thread is threaded to the bottom of the projector, so it can be used with any regular tripod.

The Bosch GLL40-20 G green laser crossbeam pattern provides you with a horizontal level line and a vertical line for plumbing issues.

It is simple to make the final adjustments to get those lines of plumb and level. Once you have approximately plumb and level the Bosch GLL40-20 G, the self-leveling feature completes the job.


The GLL40-20 G tracks power consumption with Bosch’s integrated VisiMax technology to improve line visibility and boost the line laser’s overall battery life.

Fine Positioning:

The kit includes the MM 2 Flexible Mounting Device for quick installation in stairway installations and free-standing mode. It has micro-fine height adjustment that allows the user to adjust the device’s working height and then lock it.

Green Laser:

The GLL40-20 G provides a green laser with the same power source up to 2X brighter than our red beam lasers. The laser leveling has a working range of up to 40 Ft as well.


  • Cross-line mode – projects two bright lines that are precisely level and plumb, for a wide array of leveling and alignment applications.
  • Compact 40 Ft. cross-line laser design – features green beams for visibility, self-leveling technology for accuracy and VisiMax™ for brightness.
  • Bright green-beam laser lines — up to 2X brighter than standard red beams.
  • Ergonomic, compact and lightweight – easy to use and easy to store.
  • MM, 2 Flexible Mounting Device – clamps to multiple surfaces and provides a rotating 360° neck for quick setup and simple fine-tuning.

This green laser from Bosch GLL40-20 G is an easy recommendation. This is a sensible purchase from Toptopdeal if you need a cross-beam laser and want to use it in daylight. The Bosch GLL40-20 G is targeted at a market other than the GLL3-300, which is highly privileged.

Although it does not have all of the higher-end laser’s capabilities, its ability to display good, bright intersecting lines would make it a useful tool for any handyman, or handy homeowner. Its compact size makes it easy to store and slide around, and it is easy and intuitive to use its self-leveling capability.