Perspective view of the Bosch GLL50-20 self-leveling cross-line laser level projecting red horizontal and vertical beams for professional construction layout and leveling.
Detailed infographic of the Bosch GLL50-20 laser level highlighting its smart pendulum system, IP55 rated construction, full rubber overmold housing, and 50-foot range.
Side view of the Bosch Professional GLL50-20 cross-line laser focusing on the red on/off sliding power switch and the textured rubber overmold impact protection.
Front-facing view of the Bosch GLL50-20 laser level showing the vertical laser aperture and the internal diode components protected by a rugged blue and black housing.
Rear view of the Bosch GLL50-20 laser tool showing the integrated magnetic mount with a built-in keyhole for hanging and the battery compartment access.
A professional using the Bosch GLL50-20 laser level mounted to a metal stud to align and install wooden cabinets in a residential kitchen.
The Bosch GLL50-20 self-leveling laser mounted on a tripod in a kitchen, projecting red cross-lines on a wall to assist with precise layout and hardware placement.
A person's hand holding the Bosch GLL50-20 laser level against a metal wall stud, demonstrating the strength and utility of the tool's integrated multipurpose magnetic mount.
A worker on a commercial jobsite using the Bosch GLL50-20 laser level magnetically attached to a vertical steel track to project leveling lines across a large room.
The Bosch GLL50-20 cross-line laser mounted on a professional tripod in manual tilt mode, projecting angled red beams for marking layout points on a concrete staircase.
A construction professional kneeling in a room using the red cross-line beams from a tripod-mounted Bosch GLL50-20 laser level to mark precise plumbing or electrical points on a wall.
Bosch Measuring & Layout Tools warranty graphic showing a 1-year limited tool warranty with an additional 1-year extension available upon product registration.
Perspective view of the Bosch GLL50-20 self-leveling cross-line laser level projecting red horizontal and vertical beams for professional construction layout and leveling.
Detailed infographic of the Bosch GLL50-20 laser level highlighting its smart pendulum system, IP55 rated construction, full rubber overmold housing, and 50-foot range.
Side view of the Bosch Professional GLL50-20 cross-line laser focusing on the red on/off sliding power switch and the textured rubber overmold impact protection.
Front-facing view of the Bosch GLL50-20 laser level showing the vertical laser aperture and the internal diode components protected by a rugged blue and black housing.
Rear view of the Bosch GLL50-20 laser tool showing the integrated magnetic mount with a built-in keyhole for hanging and the battery compartment access.
A professional using the Bosch GLL50-20 laser level mounted to a metal stud to align and install wooden cabinets in a residential kitchen.
The Bosch GLL50-20 self-leveling laser mounted on a tripod in a kitchen, projecting red cross-lines on a wall to assist with precise layout and hardware placement.
A person's hand holding the Bosch GLL50-20 laser level against a metal wall stud, demonstrating the strength and utility of the tool's integrated multipurpose magnetic mount.
A worker on a commercial jobsite using the Bosch GLL50-20 laser level magnetically attached to a vertical steel track to project leveling lines across a large room.
The Bosch GLL50-20 cross-line laser mounted on a professional tripod in manual tilt mode, projecting angled red beams for marking layout points on a concrete staircase.
A construction professional kneeling in a room using the red cross-line beams from a tripod-mounted Bosch GLL50-20 laser level to mark precise plumbing or electrical points on a wall.
Bosch Measuring & Layout Tools warranty graphic showing a 1-year limited tool warranty with an additional 1-year extension available upon product registration.
BOSCH

Bosch Cross Line Laser Level GLL50-20 50 Foot Red Beam (Self Leveling Integrated Magnetic Mount 1/4-20 Thread Construction Sizing Layout Alignment Tool)

In stock
SKU: GLL50-20
$82.97 USD

Description

Bosch Promtional Logo Logout

Professional Self-Leveling Cross-Line Laser Level System with Integrated Magnetic Mount

The Bosch GLL50-20 is an industrial-grade self-leveling cross-line laser level engineered to project highly visible horizontal and vertical red reference lines simultaneously for precise structural interior construction sizing. Driven by a Class 2 laser diode configuration, this compact layout instrument delivers a reliable 50-foot operational range and an accuracy threshold of ±5/16-inch at 30 feet across an automatic self-leveling pendulum arc of up to 3.5 degrees. Outfitted with a full rubber overmold roll cage housing that achieves an IP55 dust and water ingress protection rating, the versatile layout tool utilizes an integrated magnetic bracket base, a manual angle tilt mode, and a dual-power interface compatible with both standard AA batteries or a rechargeable 3.7V lithium-ion pack to ensure uninterrupted workflow performance during demanding jobsite surveys.

Best Used For:

  • Commercial Cabinetry Alignment: Levelling long-run cabinet bases and plumbing wall-mounted storage units accurately across interior layouts.
  • Wall Tile and Backsplash Grid Layouts: Projecting crisp perpendicular cross-line references to map out ceramic or stone tile layout lines over vertical surfaces.
  • Residential Wood and Metal Framing: Squaring vertical track positions and plumbing wall stud locations across residential basement additions.

Key Performance & Safety Features

  • Simultaneous Cross-Line Mode: Projects two bright lines that are precisely level and plumb for comprehensive vertical and horizontal alignment applications.
  • Smart Pendulum Auto-Leveling: Internal gravity pendulum self-corrects orientation angles within a 3.5-degree arc and displays a warning signal when pushed out of alignment.
  • Integrated Multi-Surface Mount: Built-in rare-earth magnets anchor the chassis securely to steel studs, channels, or frames, supported by a standard 1/4-inch-20 thread path.
  • Full Rubber Overmold Cage: High-durrometer shock-dampening armor protects critical drop impact points from hard jobsite falls.
  • Dual-Power Flex Circuitry: Operates on two standard AA cells or interfaces with an optional 3.7V lithium-ion battery pack for continuous pass-through charging.
  • Secure Pendulum Transport Lock: Internal mechanical pendulum clamps firmly when powered down to protect the sensitive calibration setup from field vibration shock.

What's Included

  • (1) GLL50-20 Self-Leveling Cross-Line Laser Level
  • (1) Integrated Magnetic Mounting Bracket Assembly
  • (2) Alkaline AA Batteries

Technical Specifications

Brand Name: Bosch
Model Number: GLL50-20
Tool Component Classification: Self-Leveling Cross-Line Laser Level
Maximum Optical Working Range: Up to 50 ft.
Leveling Accuracy Rating: ±5/16 in. @ 30 ft.
Self-Leveling Pendulum Arc: Up to 3.5 Degrees
Laser Diode Profile Class: Class 2 Red Beam
Ingress Protection Rating: IP55 (Dust-Protected & Water-Jet Resistant)
Mount Threading Interface: 1/4 in. - 20 Thread Path
Total Number of Laser Beams: 2 Beams (Horizontal and Vertical Axis)
Operating Temperature Window: 14°F to 104°F
Primary Power Supply Options: (2) AA Batteries (Included) or Optional 3.7V Li-Ion Pack
Chassis Housing Material: Engineered Plastic Composite with Full Rubber Overmold

Pro-Tip: When shifting from standard leveling to rafter pitch or custom staircase handrail alignments, engage the manual tilt mode function. This locks the auto-leveling warning loop while keeping the pendulum floating safely, allowing you to incline the cross-lines at any structural angle without triggering out-of-level flashing alerts.