Bosch · GLL300-42GL
Ready to buy
The retained reference is $539 current U.S. retail price. Receiver, tripod, pole and site calibration are not included. Verify line geometry, range conditions, mounts, included accessories, laser class, inspection procedure, authorized seller, warranty and return rights before purchase.
Current market
Each line carries its own check date because price, software, specifications, and product cycle do not age at the same speed.
Receiver, tripod, pole and site calibration are not included. Confirm current stock, exact kit contents, authorized U.S. seller, tax, shipping, return rights and service eligibility before paying.
GLL300-42GL is defended for broad interior layout when three planes, dual power and a compact current kit matter more than remote automation.
Other paths
These are not generic competitors. Each one represents a different way to buy into the same market.
DEWALT
Milwaukee
What changed
Older observations stay in the ledger when the current view changes. That lets a buyer tell the difference between an old complaint, an active issue, and a problem that was corrected.
GLL300-42GL was checked against exact identity, current U.S. price, geometry, laser class, range conditions, accuracy basis, leveling and slope, mount and detector compatibility, power, durability, calibration, service, safety and outcome boundaries, independent professional evidence and bounded operator reports.
Each amount stays tied to its source and capture date. Conflicting prices remain visible until the seller resolves them.
Current reference priceA structured timeline will begin with the next source capture
Owner experience
Owner and operator discussion returns to plane coverage, fine adjustment, receiver sectors, line thickness and calibration after transport rather than a universal accuracy, durability or productivity result.
These are self-selected reports from different units, distances, light, surfaces, weather, mounts, receivers, rods, batteries, drops, calibration histories, crews, sellers and service channels. They identify setup and inspection questions and do not establish accuracy, calibration retention, reliability, safety, failure rates, grade, level, plumb, square, productivity or finished-work outcomes.Self-selected operators discuss visibility, mounting, detector use, calibration checks, drops, batteries and service. Reports vary by distance, light, surface, setup and tool history and do not establish accuracy or reliability rates.
Prove all three planes and both 90-degree intersections over the longest intended room before marking production work.
1 evidence recordSources
The page separates what a source states directly from what we conclude across sources.
Bosch identifies GLL300-42GL as a rechargeable three-plane Bosch system for full-room level, plumb, square and transfer work.
$539 current U.S. retail price was retained for GLL300-42GL. Receiver, tripod, pole and site calibration are not included
Class 2 green laser projecting one horizontal and two orthogonal vertical 360-degree planes; their intersections aid plumb and square layout but do not prove building geometry 100-foot visible range and up to 260 feet with the compatible receiver at named horizontal sectors; quote the diameter and receiver conditions rather than calling it a universal 260-foot visible laser Published accuracy is ±1/8 inch at 30 feet. Run horizontal reversal, vertical plumb and 90-degree intersection checks at the working distance and record marks before layout Self-levels within ±4 degrees, indicates out-of-level and locks for transport; confirm the manual-mode behavior before specifying an intentional rake or stair line
Fine-adjust magnetic mount uses 1/4-20 and 5/8-11 paths and the optional Bosch receiver must match the pulsed green planes. A tripod head and substrate can add more error than the laser rating 3.7 V Li-ion, AA fallback, USB-C operation and IP65 protection support daily work; neither the ingress claim nor rubber overmold guarantees calibration after a fall Bosch service and registered warranty boundaries apply. Keep a dated check log, lock before travel and isolate a unit that fails a tolerance check. Never aim a plane through occupied eye level or toward traffic
FDA explains that Class 2 visible lasers depend on the aversion response and that Class 3R direct viewing can be hazardous. Product class does not make deliberate viewing or aiming at people acceptable.
OSHA construction rules require qualified operators, warning placards, shutter or power-off when unused, no direction at employees and positioning above head level where possible.
Professional comparison evaluates point, cross-line and three-plane tools by geometry, visible and receiver range, accuracy basis, power, mounts and job fit. It is decision context rather than manufacturer proof for every exact SKU.
Self-selected operators discuss visibility, mounting, detector use, calibration checks, drops, batteries and service. Reports vary by distance, light, surface, setup and tool history and do not establish accuracy or reliability rates.
12V MAX 3 x 360 Green Line Laser is the 12 v three-plane interior layout defended alternative at $499 current U.S. retail price.
M12 Green 360-Degree 3-Plane Laser Kit is the m12 three-plane interior layout defended alternative at $649 current U.S. retail price.
Manufacturer identity, exact manual or support documentation, current U.S. price, independent professional decision evidence and bounded owner or operator evidence were checked on August 19, 2026. This desk covers complete current U.S.-supported point, line, plane and rotary laser layout systems used by trades and serious construction buyers. A detector, receiver or remote is part of the counted system only when bundled with the exact kit or intrinsic to its working method; otherwise it remains a separately priced compatibility boundary. The desk excludes bubble levels, laser distance meters, surveying total stations, unsupported marketplace devices, bare accessories, cosmetic bundles, minor color or battery-pack padding and duplicate tool-body or kit variants without a material system difference. Laser class, color and visual brightness do not establish useful range, accuracy or eye safety. Visible range and detector-assisted radius or diameter are separate claims that vary with light, weather, target, rotation speed and setup. Published accuracy belongs to a named geometry, distance, axis and condition and is not a calibration certificate. Points, lines, plane intersections, plumb, square, rotary axes, mounts, receiver zeros and rods can require separate checks. Self-leveling compensation, manual lock, fine rotation, automatic alignment and single- or dual-axis slope are different functions. Manual or receiver-guided slope does not import a design grade or establish survey control. Tripod stability, magnetic hold, clamp reference, thread compatibility, benchmark protection, battery state, ingress and post-impact checks remain operator duties. IP and drop claims do not guarantee retained calibration or cover open battery doors, all accessories, immersion or continued use after a fall. Follow the exact manual, FDA labeling and applicable OSHA construction-laser practice. Use qualified operators, warning controls, beam shutters or power-off when idle, and keep direct and reflected beams away from people and vehicles. Visibility glasses are not protective eyewear. Use manufacturer repair or calibration service when a field check fails and do not open the optical system. No construction laser guarantees code compliance, survey-grade control, grade, plumb, square, level, finished appearance, rework avoidance, productivity, safety or any job outcome.
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