The Bosch 18V Green Beam Horizontal Rotary Laser Kit GRL18V-31K is displayed as a complete set against a clean white background. This automatic construction site level transit grading tool kit includes the horizontal green beam rotary laser unit, an 18V lithium-ion battery pack, a fast desktop battery charger, a matching alkaline battery adapter cartridge, an LR20 laser receiver, a heavy-duty aluminum tripod stand, and a multi-section grade rod.
An infographic diagram showcasing the primary technical features of the Bosch automatic construction site level transit over a dark blue backdrop. Connected lines emphasize key product specifications, detailing its long working range spanning a 2,000-foot diameter, a specialized horizontal-only laser head, a simple one-button operation configuration, an IP66 job-site-tough environmental rating, and a high accuracy rating of up to ±1/16-inch at 100 feet.
A close-up view of the Bosch green beam horizontal rotary laser unit mounted securely on its aluminum tripod stand at an active construction site. In the blurry background, a worker wearing a white hard hat and a high-visibility yellow safety vest can be seen mapping out concrete foundation formwork layouts. Large text below notes an easy-to-use rotary laser with a self-leveling range of ±15%.
An action image displays an aluminum building tripod collapsed sideways on a muddy earthworks job site, splashing water across the ground as it falls. A descriptive product banner running along the bottom highlights that the cordless laser level housing is engineered job-site tough and IP66 rated for complete dust-tight and water resistance.
A close-up view of a technician's hands in protective black work gloves sorting battery packs next to the tripod-mounted Bosch grading transit level. The visual demonstration highlights the tool's power flexibility configuration for efficient use with an 18V lithium-ion battery pack or an adjacent open cartridge containing standard C-cell batteries.
A professional marketing warranty graphic for the Bosch Measuring and Layout Tools product series. The clean dark blue and red backdrop features the standard company logo alongside a bold visual announcement detailing an official 1-year tool warranty policy, plus an extra 1-year extension when registered within eight weeks of purchase.
New Bosch Rotary Lasers | Bosch WOC 2026 promotional video
The Bosch 18V Green Beam Horizontal Rotary Laser Kit GRL18V-31K is displayed as a complete set against a clean white background. This automatic construction site level transit grading tool kit includes the horizontal green beam rotary laser unit, an 18V lithium-ion battery pack, a fast desktop battery charger, a matching alkaline battery adapter cartridge, an LR20 laser receiver, a heavy-duty aluminum tripod stand, and a multi-section grade rod.
An infographic diagram showcasing the primary technical features of the Bosch automatic construction site level transit over a dark blue backdrop. Connected lines emphasize key product specifications, detailing its long working range spanning a 2,000-foot diameter, a specialized horizontal-only laser head, a simple one-button operation configuration, an IP66 job-site-tough environmental rating, and a high accuracy rating of up to ±1/16-inch at 100 feet.
A close-up view of the Bosch green beam horizontal rotary laser unit mounted securely on its aluminum tripod stand at an active construction site. In the blurry background, a worker wearing a white hard hat and a high-visibility yellow safety vest can be seen mapping out concrete foundation formwork layouts. Large text below notes an easy-to-use rotary laser with a self-leveling range of ±15%.
An action image displays an aluminum building tripod collapsed sideways on a muddy earthworks job site, splashing water across the ground as it falls. A descriptive product banner running along the bottom highlights that the cordless laser level housing is engineered job-site tough and IP66 rated for complete dust-tight and water resistance.
A close-up view of a technician's hands in protective black work gloves sorting battery packs next to the tripod-mounted Bosch grading transit level. The visual demonstration highlights the tool's power flexibility configuration for efficient use with an 18V lithium-ion battery pack or an adjacent open cartridge containing standard C-cell batteries.
A professional marketing warranty graphic for the Bosch Measuring and Layout Tools product series. The clean dark blue and red backdrop features the standard company logo alongside a bold visual announcement detailing an official 1-year tool warranty policy, plus an extra 1-year extension when registered within eight weeks of purchase.
New Bosch Rotary Lasers | Bosch WOC 2026 promotional video
BOSCH

Bosch 18V Green Beam Horizontal Rotary Laser Kit Self Leveling Cordless Automatic Construction Site Level Transit Grading Tool GRL18V-31K

Only 3 left
SKU: GRL18V-31K
$999.00 USD

Description

Bosch Promtional Logo Logout

Dominate Outdoor Grading and Layout Tasks with High-Visibility Green-Beam Precision

The Bosch GRL18V-31K 18V Green-Beam Horizontal Rotary Laser Kit is a comprehensive, ultra-precise site leveling solution built to withstand the harshest commercial contracting environments. Featuring an advanced green-beam laser diode that projects a line up to four times brighter than standard red beams, this high-performance transit level provides exceptional visibility across long distances, even under direct sunlight. Engineered specifically for massive outdoor grading, concrete formwork alignment, and excavation setups, this system features a streamlined, one-button user interface that eliminates complex menu tracking. Turn the tool on, and its smart internal systems handle the rest, enabling seamless automatic self-leveling so your crew can get to work immediately.

Engineered for maximum versatility on unpredictable terrain, this structural leveling tool features a wide ±15% self-leveling range that ensures rapid, error-free setup on uneven ground. Its heavy-duty composite framework is IP66-rated to be completely dust-tight and resistant to high-pressure water jets, and it has been officially drop-tested to survive a 5-foot tripod tip-over shock. To prevent costly downtime on remote jobs, the laser boasts a flexible dual-source power system, allowing it to run continuously on the included universal AMPShare 18V Lithium-Ion battery pack or standard C alkaline batteries using the provided adapter sleeve. Complete with a heavy-duty tripod, a telescoping grade rod, and a robust laser receiver, this kit provides a 1,000-foot working range with an accuracy of up to ±1/16-inch at 100 feet.

Key Features

  • Ultra-Bright Green Laser Diode: Delivers exceptional visibility that is up to 4X brighter than classic red lasers, optimizing performance for long-range outdoor layouts.
  • Rapid One-Button Interface: Simplified singular button design streamlines setup and operation while full automatic self-leveling eliminates manual calibration errors.
  • Dual Power Flexibility Architecture: Operates seamlessly using the included 18V 4.0Ah battery pack or conventional C alkaline cells for flexible power management.
  • IP66 Environmental Rating: Heavy-duty dust-tight construction shields delicate internal optics from harsh windborne site dust and powerful rain or water splashes.
  • Massive 1,000-Foot Operational Range: Provides dead-on reliability across vast distances with a tight structural accuracy of up to ±1/16 in. at 100 ft.
  • AMPShare Battery Compatibility: Part of a cross-brand cordless ecosystem, the included battery works across an expansive array of professional power tools.

What's Included

  • (1) GRL18V-3-31G Horizontal Green-Beam Rotary Laser
  • (1) EXBA18V-40 18V 4.0Ah Lithium-Ion Battery
  • (1) GAL18V-40 Fast Battery Charger
  • (1) BA18-C Alkaline Battery Adapter Sleeve
  • (1) LR20 Heavy-Duty Laser Receiver
  • (1) BT170HD Heavy-Duty Aluminum Building Tripod
  • (1) GR8 Aluminum Telescoping Grade Rod
  • (1) Impact-Resistant Plastic Molded Carrying Case

Specifications

Product Parameter Technical Details
Brand Name Bosch
Leveling Type Automatic Self-Leveling (Up to 5°)
Laser Beam Color Green High-Visibility
Working Range (Diameter) Up to 1,000 ft
Horizontal Accuracy ±1/16 in at 100 ft
Self-Leveling Alignment Range ±15%
Environmental Protection Rating IP66 (Dust-Tight & Water-Resistant)
Laser Diode Class Class 2 (500 - 540 nm)
Mount Threading Base 5/8 in - 11 UNC
Assembled Tool Length 40.0 in
Assembled Tool Width 10.0 in
Assembled Tool Height 23.0 in
Shipping System Weight 39.0 lbs
Operating Temperature Limits 14°F to 122°F
MFG Part # (OEM) GRL18V-31K


Pro-Tip: Before beginning a long grading run, clear any direct optical obstructions within a 5-foot radius of the tripod stand. Because green-beam lasers operate with incredible light intensity, keeping the immediate path free of thick dust blankets or hanging foliage stops the light plane from scattering prematurely, preserving maximum signal clarity across your full 1,000-foot work site perimeter.