A professional product shot of the Bosch GCL100-40G green beam self-leveling cross-line laser, showing the unit projecting bright green horizontal and vertical lines and two plumb points for precise layout alignment.
An infographic of the Bosch professional cross-line laser level highlighting key features including cross-line and plumb points, an onboard user interface, an integrated switch, a smart pendulum system, full rubber overmold housing, and high-visibility green beams.
A technical graphic for the Bosch GCL100-40G indicating professional specifications: accuracy up to plus or minus 1/8 inch, a working range up to 165 feet, and an IP64 rating for dust and water protection on the jobsite.
An instructional diagram illustrating the four selection modes of the Bosch green beam laser: horizontal laser line, vertical laser line, combined horizontal and vertical lines with plumb points, and independent laser plumb points.
An application photo of the Bosch GCL100-40G mounted on a tripod in a construction setting, where a professional contractor is using the projected green laser lines to accurately mark layout points on a concrete wall.
An indoor jobsite action shot showing the Bosch green beam laser level sitting on a flat surface, projecting a long-distance horizontal leveling line across a large open basement for wall and electrical installation.
A professional product shot of the Bosch GCL100-40G green beam self-leveling cross-line laser, showing the unit projecting bright green horizontal and vertical lines and two plumb points for precise layout alignment.
An infographic of the Bosch professional cross-line laser level highlighting key features including cross-line and plumb points, an onboard user interface, an integrated switch, a smart pendulum system, full rubber overmold housing, and high-visibility green beams.
A technical graphic for the Bosch GCL100-40G indicating professional specifications: accuracy up to plus or minus 1/8 inch, a working range up to 165 feet, and an IP64 rating for dust and water protection on the jobsite.
An instructional diagram illustrating the four selection modes of the Bosch green beam laser: horizontal laser line, vertical laser line, combined horizontal and vertical lines with plumb points, and independent laser plumb points.
An application photo of the Bosch GCL100-40G mounted on a tripod in a construction setting, where a professional contractor is using the projected green laser lines to accurately mark layout points on a concrete wall.
An indoor jobsite action shot showing the Bosch green beam laser level sitting on a flat surface, projecting a long-distance horizontal leveling line across a large open basement for wall and electrical installation.
BOSCH

Bosch Green Cross Line Laser Level GCL100-40G 165 Feet Range (VisiMax Technology IP64 Rating RM10 Rotating Mount Plumb Points Professional Construction)

Only 1 left
SKU: GCL100-40G
$299.99 USD

Description

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Bosch GCL100-40G Green-Beam Self-Leveling Cross-Line Laser Level with Plumb Points

The Bosch GCL100-40G Green-Beam Self-Leveling Cross-Line Laser Level is a professional optical alignment instrument engineered for precise horizontal leveling, vertical plumb transfer, and 90-degree square layout across commercial drywall framing, electrical rough-in, and interior finish carpentry. Delivering bright green intersecting projection lines up to 4 times brighter than standard red beams with a 165-foot line range and 50-foot plumb point range, this 1.28-pound tool features VisiMax technology for optimized line visibility, an IP64 dust and water ingress protection rating, and a smart pendulum locking mechanism for safe transport.

Best Used For:

  • Overhead Electrical Box & Fixture Plumb Transfer: Transferring layout points rapidly from floor to ceiling using integrated upward and downward plumb dots.
  • Commercial Wall Stud Framing & Drywall Layout: Projecting bright green horizontal and vertical reference lines across large partition walls and metal stud tracks.
  • Cabinetry & Drop Ceiling Grid Alignment: Establishing level mounting references across room perimeters for upper kitchen cabinets and suspended ceiling grids.

Key Performance & Safety Features

  • 4X Brighter Green Laser Diode: High-efficiency green optical beam remains fully visible across bright interiors and long working distances up to 165 ft.
  • Integrated Upward & Downward Plumb Points: Projects top and bottom vertical dots instantly to transfer layout points from floor slabs to ceiling headers.
  • VisiMax Technology Power Management: Actively monitors power draw and internal temperature to maximize line brightness and extend battery runtime.
  • Smart Pendulum Self-Leveling System: Automatically self-levels within ±4 degrees and locks securely into position when powered off to protect internal optics.
  • IP64 Environmental Dust & Water Sealing: Rugged rubber-overmolded housing guards internal diodes against heavy jobsite dust and splashing water spray.
  • RM10 Magnetic Rotating Mount Included: Attaches securely to steel studs and tracks with micro-fine height adjustment knobs for fast setup.

What's Included

  • (1) Bosch GCL100-40G Green-Beam Cross-Line Laser Level
  • (1) RM10 Magnetic Rotating Mount Bracket
  • (4) AA Alkaline Batteries
  • (1) Hard Protective Carry Case

Technical Specifications

Brand / Manufacturer Bosch
Model / Part Number GCL100-40G
Laser Projection Type Green Beam Cross-Line with Plumb Points
Maximum Laser Line Working Range Up to 165.0 ft (50.29 m)
Maximum Plumb Point Working Range Up to 50.0 ft (15.24 m)
Self-Leveling Mechanism Range Automatic Self-Leveling (within ±4°)
Environmental Ingress Protection Rating IP64 (Dust-Tight & Water-Resistant)
Power Supply Requirement 4 AA Alkaline Batteries (Included)
Tripod Mounting Thread Size 1/4 in. - 20 Thread UNC Socket
Net Product Item Weight 1.28 lbs (0.58 kg / 20.48 oz)
Factory Warranty Coverage 2-Year Limited Manufacturer Warranty
Pro-Tip: Engage the transport lock switch whenever carrying the laser level between rooms; locking the internal pendulum gimbal prevents shock damage to delicate optical pivot bearings during transit.