Bosch GLL50-20 Self-Leveling Cross-Line Laser, 50 ft Range

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Product guide

Bosch GLL50-20 Self-Leveling Cross-Line Laser, 50 ft Range

The Bosch GLL50-20 is a self-leveling cross-line laser for home projects and small remodels. It projects level and plumb lines, with a listed range of 50 ft and stated accuracy of ±5/16 in. at 30 ft. Its mount supports magnetic or threaded attachment, and it can run on AA batteries or a separately sold Bosch lithium-ion battery.

At a glance

Self-leveling cross-line mode projects horizontal and vertical reference lines.
The manufacturer lists a 50 ft range and accuracy of ±5/16 in. at 30 ft.
Integrated mount can attach magnetically or through a 1/4 in. – 20 threaded mount.
Single-switch operation and compact listed dimensions suit basic household alignment tasks.
Uses two AA batteries or a compatible Bosch 3.7V lithium-ion battery sold separately.

Price

$56.24Save 22%

Reference price: ~~$71.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

AA batteries are listed as included, so the supplied kit has a ready-to-use power option.
Magnetic and threaded mounting options give flexibility when positioning the laser.
Self-leveling alerts to an out-of-level condition by blinking, and the pendulum locks for transport.
The stated accuracy and 50 ft range provide useful guidance for picture hanging, shelving and small remodeling tasks.

Cons

The listing describes an entry-level tool for homeowners and small remodeling jobs, rather than positioning it for more extensive layout work.
The alternative Bosch lithium-ion battery is sold separately.

Technical specifications

14 specifications

Identity
Brand	Bosch
Model	GLL50-20

Performance and operation
Range	50 Ft.
Accuracy	±5/16 In. accuracy at 30 Ft.
Operation mode	Automatic
Line output	Projects two bright, level and plumb lines.
Self-leveling system	Self levels, indicates out-of-level condition by blinking and locks when switched off for secure transport.
Laser classification	Class 2 laser, <5mW

Mounting and power
Mounting options	Positions and mounts with magnets or threaded mounts (1/4 In. – 20).
Battery options	Works with (2) AA batteries (included) or Bosch’s 3.7V Lithium-Ion 1.0 Ah battery (sold separately), for less downtime on the job.

Dimensions and installation
Dimensions listed	10.4L x 6.4W centimetres
Weight listed	485 g

Materials and protection
Material listed	Plastic Rubber
Housing and rating	This tool has full rubber overmold housing, designed to be similar to a roll cage, so every major impact point is reinforced with rubber. It has an IP55 rating and pendulum locks for safe transport.

What to know before buying

The stated 50 ft range is separate from the accuracy claim, which is ±5/16 in. at 30 ft. The listing also calls the lines bright, but customer feedback is mixed on brightness, durability and magnet strength. Treat IP55 and housing protection as manufacturer claims, and consider the intended working conditions when choosing it.

What’s in the box

Included

GLL50-20 self-leveling cross-line laser
Integrated magnetic mount
2 AA batteries

Who is it for?

A good fit for

Homeowners aligning pictures, shelves and other fixtures.
Small remodeling projects where cross-line references and simple operation are useful.
Buyers who want magnetic mounting plus a threaded mounting option.

Less suited to

Large or demanding layout jobs where a more extensive specification set is needed.
Buyers who require a specified visibility level in bright conditions, since the supplied information does not establish one.

Bosch GLL50-20 Self-Leveling Cross-Line Laser, 50 ft Range · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 786 ratings

5 stars65%65%
4 stars17%17%
3 stars9%9%
2 stars4%4%
1 star5%5%

Customer feedback describes the laser as easy to use and useful for remodeling, with positive comments about quality, functionality, versatility and perceived value. Buyers looking for straightforward household alignment may appreciate those reported experiences. Feedback is mixed on brightness, durability and magnet strength, which matter if the tool will be used in brighter spaces, handled roughly or positioned on metal surfaces. The 50 ft range and integrated magnetic mount are listing claims, not proof that those concerns will be absent.

Positive themes

Customers report that it is easy to use and can save time on remodeling tasks.
Feedback describes quality and functionality positively, and some customers find it versatile and worth the price.

Mixed feedback

Customer feedback is mixed on brightness, durability and magnet strength.

Frequently asked questions

What does the Bosch GLL50-20 project?

It projects two crossing lines described as level and plumb, for horizontal and vertical alignment.

What range and accuracy are listed?

The listing gives a 50 ft range and accuracy of ±5/16 in. at 30 ft. Those are distinct claims, so the accuracy figure should not be read as applying to the full range.

What batteries does it use?

It works with two AA batteries, listed as included, or a Bosch 3.7V Lithium-Ion 1.0 Ah battery sold separately.

How can it be mounted?

The integrated mount supports magnets or a 1/4 in. – 20 threaded mount.