By KBC Associate 
Laser levels are a simple tool that have become a toolbelt essential. They make it much faster and easier to find alignment for a wide range of construction tasks. However, laser levels range in price anywhere from 20 bucks to thousands of dollars — a range like that shows there is a lot to talk about in terms of quality and features, and which laser level should a professional use? The new Bosch GLL100-42GL 100 ft. Cross-Line Laser Level was built to provide better accuracy and visibility, and tough enough to survive accidental drops and falls.
We are exploring all of these features and more today, as well as how it compares to other cross-line lasers on the market.
Bosch 100 ft. Cross-Line Laser Level Overview
- Model Name: Bosch 100 ft. Cross-Line Laser Level Kit
- Model #: GLL100-42GL
- Power Source: Rechargeable Bosch 3.7V Li-Ion 3.0 Ah battery or AA battery option.
- Features: Green-beam technology emits four times brighter than standard red lines up to 100 ft., with accuracy within 1/8 in. at 30 ft. Self-leveling Smart Pendulum System senses and autocorrects leveling issues. Built-in VisiMax™ technology monitors tool temperature and power consumption to adjust line brightness for each use, while preserving overall tool life. Built with IP65-rated housing and “roll cage” designed rubber overmold to protect tool from major impact, along with dust-tight and waterproof design. 8-hour operating time when paired with a fully charged Bosch 3.7V Li-Ion 3.0 Ah battery, and continuous power option with provided USB-C charging cord.
- Accessories (may vary per kit): 3 Ah Li-ion battery, alkaline battery adapter, (4) AA LB10 L-Bracket, ¼ in. threading mount for tripod attachment, DK10 ceiling clip, USB-C charging cord, hard carry case.
- Price: $259
- Where to Buy: The Home Depot
- Learn More: Bosch
Bosch 100 ft. Laser Level Review
The Bosch 100 ft. Cross-Line Laser Level Kit is designed for professionals, meaning it prioritizes what trade professionals need most in a laser level, and it’s built to withstand jobsite conditions and workday demands. These are the features that stand out the most to us when considering the priorities of trade professionals.
Green-beam Technology
Green beams are four times brighter than industry-standard red beams. The result is literally easier sight lines and less errors from beams with an accuracy within 1/8 in. at 30 ft. and up to 100 ft. Built-in VisiMax™ Technology further enhances visibility by monitoring tool temperature and power consumption, allowing this Bosch laser level to adjust brightness to the environment, optimizing its visibility. This auto-adjusting also adds to the tools overall lifespan by preventing overheating.
Smart Pendulum System and Mounting Versatility
The Smart Pendulum System auto-levels the laser to display accurate beams in any setting. It also signals for out-of-level conditions to prevent inaccurate setup, or if adjustments are needed due to a change in environment.
And since you can’t always predict where and how you may need to position your level. Bosch offers serveral options with this cross-line laser level. There is an integrated ¼ in. threading mount for tripod attachment, a strong magnetic LB10 L-Bracket, and a DK10 ceiling clip. All of these options coupled with the Smart Pendulum System ensure you get accurate readings where you need them.
IP65-rated Construction & “Roll Cage” Design
Made with a heavy-duty housing that is safe from high-impact drops, falls, kicks, or general jobsite damage. It also has a dust-tight and waterproof construction to prevent water and debris from getting in and corrupting the laser level.
The all-around “roll cage”-inspired rubber overmold further protects the laser level from high-impact incidents.
8-Hour Operating Time & Power Flexibility
When paired with a fully charged Bosch 3.7V Li-ion 3.0 Ah battery users can expect a full-day 8-hour battery life. The included USB-C charging cord offers continuous use even while it provides fast charging of the Li-ion battery. And the GLL100-42GL can also utilize standard AA batteries if needed.
Value & Where to Buy
You can purchase the new Bosch GLL100-42GL 100 ft. Cross-Line Laser Level Kit for $259 from The Home Depot. At The Home Depot you can also find cross-line laser levels from DEWALT, Milwaukee, Leica, among other brands. For $259 the GLL100-42GL prices right in the middle when compared to similar laser levels. However, for only $40 more than the DEWALT (tool only). The Home Depot kit includes four AA batteries, an L-bracket, ceiling clips, and a hard carry case. Then the Milwaukee basic kit for $10 more includes an L-bracket, different accessories, but no ceiling clip.
Bosch offers a One (1) Year Measuring Tool Limited Warranty, plus an additional year of warranty coverage if you register your tool within eight weeks of purchase.
All-in-all, the whole Bosch 100 ft. Cross-Line Laser Level kit is fairly priced when compared to similar kits. It may come down to what you use your laser level for, but the Bosch kit at its price has more applications than the Milwaukee kit.
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