Description

Key Features

Full-Room Layout

The 360° horizontal plane lets you level an entire room from one setup point, so you spend less time moving the laser and more time getting work done.

Bright Green Lines

Green-beam output is up to 4X brighter than standard red beams, which makes the Bosch GLL50-40G Green-Beam Self-Leveling 360° Cross-Line Laser easier to see during layout and alignment work.

Jobsite Ready

IP64 protection, recessed windows, and a rubber-overmold housing help this laser handle dust, splashing water, and the kind of bumps that happen on real jobsites.

Overview

The Bosch GLL50-40G Green-Beam Self-Leveling 360° Cross-Line Laser is a self-leveling line laser built for interior layout, alignment, and leveling work. This is a line laser designed for room layout, installing cabinets, setting tile lines, leveling trim, and transferring reference lines around a space. Model Number: GLL50-40G. If you need one tool that can throw a vertical line and a full 360° horizontal plane from a single setup, this is the kind of laser that saves real time.

What makes this model useful on the job is how much ground it covers without forcing constant repositioning. Bosch rates it for up to 100 feet in diameter, and the 360° horizontal plane means you can establish a level reference around the room with one placement. The vertical line and horizontal plane can be projected separately or together, so you can switch from wall alignment to level transfer without dragging out another tool.

The green-beam output matters because visibility is the whole game with a layout laser. Bosch states the beam is up to 4X brighter than standard red beams, which helps when you are working in brighter indoor conditions or trying to keep the line easy to track across longer spans. That does not make it a substitute for a receiver-based exterior setup, but for the indoor remodeling and finish work this tool is aimed at, the brighter beam is a real advantage.

Bosch also did a good job on the basic user experience. The one-button onboard interface keeps mode changes simple, and the two-position recessed switch adds protection where tools usually get beat up first. The Smart Pendulum System self-levels up to 4° and indicates when the tool is out of level, so you are not guessing whether the line is trustworthy. When switched off, the pendulum locks for transport, which is one of those small details that helps the tool stay accurate over time.

From a durability standpoint, this is clearly built for jobsite use rather than shelf life. The full rubber overmold housing reinforces the major impact points, the laser windows are recessed for added protection, and the tool carries an IP64 rating for dusty or rainy conditions. It also includes a three-LED battery gauge, which is more useful than it sounds when you are moving room to room and do not want the laser dying in the middle of layout.

The setup package is solid too. Bosch includes the LB10 L-Bracket, DK10 ceiling clip, four AA batteries, and a hard carry case. The laser uses a 1/4-20 mount thread and is designed to work with tripods, telescoping pole systems, mounts, and positioning devices including Bosch BT 150, GP350, BM 1, BM3, GR 16, GR500, and LB10. That gives you flexible mounting options for wall layout, ceiling-grid work, and general room setup.

Who should buy it? This laser makes the most sense for remodelers, carpenters, cabinet installers, tile setters, electricians, and general contractors who need faster room layout with clean, visible reference lines. It is also a strong fit for serious DIY users doing kitchens, basements, and interior finish work. If your work regularly involves establishing level across a room and plumb on a wall, this is the kind of laser that earns its keep quickly.

Set Level Around the Whole Room

The main reason to step up to a 360° cross-line laser is speed. Instead of chasing a short line around the room, you get a continuous level reference that helps with cabinets, trim, wall alignment, and general interior layout.

• Projects a vertical line, a 360° horizontal plane, or both together
• Provides up to 100 ft. of working range in diameter

Better Visibility Where You Actually Work

Brighter lines mean less squinting, less second-guessing, and faster layout. Bosch rates the green beam at up to 4X brighter than standard red beams, which is a real help for indoor remodeling and finish work.

• Green-beam laser improves line visibility during alignment work
• Laser diode is Class 2, 500-540 nm

Built to Handle the Jobsite

Layout tools get set on floors, shelves, ladders, and whatever is nearby. Bosch gave this one protective overmold, recessed windows, and an IP64 rating so it is better suited to dust, splashing water, and everyday abuse.

• Smart Pendulum System self-levels up to 4° and indicates out-of-level condition
• Pendulum locks when switched off for safer transport

Simple Setup, Less Fuss

This tool is easy to live with. The controls are straightforward, the battery gauge helps avoid surprises, and the included bracket and ceiling clip give you more ways to get the laser where you need it.

• One-button interface selects vertical, horizontal, or cross-line modes
• Includes LB10 L-Bracket and DK10 ceiling clip for faster mounting options

At a Glance

100 ft.

Working Range Diameter

4X

Brighter Than Standard Red Beams

IP64

Dust and Splash Protection

1.37 lb

Tool Weight

What’s in the Box

• (1) Bosch GLL50-40G Green-Beam Self-Leveling 360° Cross-Line Laser
• (1) LB10 L-Bracket
• (1) DK10 Ceiling Clip
• (4) AA Batteries
• (1) Hard Carry Case

Key Specifications

Working Range	Up to 100 ft. diameter
Leveling Type	Self-Leveling, Up to 4°
Laser Beam Color	Green
Laser Diode	Class 2, 500-540 nm
IP Rating	IP64
Mount Threading	1/4-20
Operating Temperature	23°F to 104°F (-5°C to 40°C)
Weight	1.37 lbs

Compatibility

Mount Interface

Uses a 1/4-20 mount thread for compatible tripods, mounts, and positioning accessories.

Bosch Accessories

Works with Bosch tripods, BT 150, Telescoping Pole System, GP350, BM 1, BM3, LB10, GR 16, GR500, and other mounts and positioning devices listed by Bosch.

Built For

Carpentry Remodeling Cabinet Installation Interior Layout Tile and Finish Work Electrical General Contracting DIY / Hobbyist

Pro Tip

When you are laying out cabinets or trim, set the 360° horizontal plane first and leave the laser in one spot as long as possible. That is where this tool saves time compared to a basic line laser, because every move introduces another setup check.

Warranty & Support

Bosch measuring and layout tools are covered by a 1-year limited warranty, with an additional year when the tool is registered within eight weeks of purchase.

Tool Nut’s Take

Tool Nut’s Take

Bosch GLL50-40G Green-Beam Self-Leveling 360° Cross-Line Laser Makes Sense for Real Interior Layout

This is a smart buy if you want faster room layout, better beam visibility, and a laser that is built to survive actual jobsite use.

• Who it’s for: Remodelers, finish carpenters, cabinet installers, tile setters, electricians, and serious DIY users working on interior layout and leveling.
• Why it stands out: The 360° horizontal plane, bright green beam, IP64 build, and included mounting accessories make it more than just a basic cross-line laser.
• Worth knowing: This tool is strongest in indoor layout work where beam visibility and one-point setup save time. If that is your workflow, it is a very practical upgrade.

Common Questions

• Is this a self-leveling laser? Yes. It uses Bosch’s Smart Pendulum System and self-levels up to 4°.
• What layout modes does it offer? It can project a vertical line, a 360° horizontal plane, or both together in cross-line mode.
• How does it mount? It uses a 1/4-20 mount thread and works with compatible tripods, mounts, and Bosch positioning accessories.
• Can it handle dusty or damp jobsite conditions? Yes. Bosch rates it IP64 for dust and splashing water protection.