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The Bosch GLL50-20 is a professional-grade 50 ft self-leveling cross-line laser featuring bright, thin red lines with 5/16 inch accuracy at 30 feet. It offers flexible power options with included AA batteries or optional Bosch Lithium-Ion battery for extended runtime. Built tough with an IP55 rating and rubber overmold housing, it withstands harsh jobsite conditions. The smart pendulum system ensures automatic leveling and secure transport lock. Compact and ergonomic, it includes an integrated magnetic mount and tripod compatibility, making it the go-to tool for precise, reliable leveling on any project.









| ASIN | B0CKJXX4XR |
| Batteries | 2 12V batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #8,917 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Horizontal & Vertical Lasers |
| Brand | Bosch |
| Color | Blue and Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,498) |
| Date First Available | October 5, 2023 |
| Finish | Brushed |
| Included Components | GLL50-20 Self-Leveling Cross-Line Laser, Integrated Magnetic Mount, (2) AA Batteries |
| Item Package Quantity | 1 |
| Item Weight | 12.3 ounces |
| Item model number | GLL50-20 |
| Manufacturer | BOSCH |
| Material | Plastic, Rubber |
| Operation Mode | Automatic |
| Part Number | GLL50-20 |
| Pattern | Solid |
| Power Source | Battery Powered |
| Product Dimensions | 4.1"L x 2.5"W |
| Shape | Rectangular |
| Size | One Size |
| Special Features | self-leveling |
| Style | 50ft |
| UPC | 000346811513 |
| Warranty Description | Bosch measuring and layout tools are covered by a one year limited warranty with an additional year when you register your tool within eight weeks of purchase - for details, call 1-877-BOSCH99 |
A**R
Well-made, quality laser level
This laser level is outstanding, portability, works great, always level…. this tool gets used the most in my toolbox. The battery life is outstanding. The brightness is good and the accuracy is correct. I’ve checked it with my other levels and it’s always right on.
C**Y
Reliable and accurate
Needed something quick and reliable. This was both. I used it to help me bolt hangers to the ceiling in my garage for those cable lifting storage racks. Worked perfectly for what I needed. Could clearly see the red lines. Took getting used to how to set it so it would cross all premarked spots so I knew it was lined up across the rafters in a straight line. I've always wanted something like this but never "needed" one until now. I'm sure I'll use it often.
L**T
Ok for the price
This works ok for the price. But you need either a tripod or something to set it in as its not adjustable at all. And ince you try to tilt it too far up it won't level itself any more.
F**R
Do Not Try to Wallpaper Without It!
I bought this level to help me install wallpaper. It took a bit of practice, but once I understood how to use it, it was very simple and extremely helpful. The level has an adjustable clamp which allows you to mount it on almost anything (I’ve mounted it on a wooden stair railing, a step ladder, etc.). If the red lines don’t show on the wall, it’s because you don’t have the level *ahem* level. If the lines don’t show, it’s not broken, it’s user error. The lines are clear and crisp and allowed me to get a perfectly plumb line every time. The wallpaper I installed has a very intricate pattern, so matching the seams had to be flawless. By using this level, every seam was flawless, even the 12-foot long wall!
P**M
Great product
This was one of those purchases that I said how have I lived so long without this. Great value, easy to use, love it…
T**R
Recommended, but for short in home use. not recommended for outside use.
Nice unit. the Line (Red) is not easy to see in sunlight type conditions. During the rebuild of a home the only light source was the sun and trying to see this units lines in sunlight is not possible. The unit works very well in low light conditions, but is none existent in brighter lighting. The unit works as described and I was very let down as all my other bosh products are amazing. This unit was sub par for the price. The setup and use of the product is so simple and was just what i wanted.
S**R
Need a Level Line on a Wall? Use This Level.
I bought this because I had to drill two holes in my wall, about 67" AFF and about 70" apart. Their measurements to the ceiling were 1/4" different. Was the floor unlevel or was it the ceiling? Laser level to the rescue. Here are some lessons learned and comments on other reviewers' critiques: • This thing seems accurate when placed about 10' from wall as measured with a Stabila 6' level. (I know, I could have used the Stabila for my job, but I wanted the laser.) • This is not like a flashlight, i.e., you can't hold it in your hand and shine it at any height on the wall and see a level line. You have to raise it to the height where you want the horizontal line to appear. This is where a tripod comes in handy. I used an old Amazon Basics 60" adjustable camera tripod. It worked great. The crank on the tripod lets you raise/lower the level precisely. • The laser mechanism rides on a gimbal. If you cock/tilt the laser body and the gimbal doesn't have enough "wiggle room" to keep things level, the laser blinks in warning. People who complain about this behavior are not keeping their laser upright enough. Probably aren't using a tripod. • Finally, and the reason I wrote this review, is the quality of the box — it is great! If you want to put your level away until you use it again at some later date, everything packs neatly and safely back into the box. Just toss that box in a drawer and everything will be kept safely together. It's better than most blow-molded plastic cases you get with tools, IMHO. All in all, with this laser I was able to quickly and confidently mark these two holes and hang a 6' x 4' framed tapestry perfectly. I actually delayed completing the job until I received the laser and I'm glad I did.
K**.
Great Tool for any DIYer!
This is an incredibly useful tool for anyone who routinely hangs items or builds things. The laser line is clear to see even in bright lighting. It is easy to use and comes with a standard threading for any tripod so you don't have to just use the Bosch one. Highly recommend!
G**A
Buen producto, funcional
V**C
It serves its purpose.
H**R
The listing photo indicates a case included. This model doesn’t come with a case. Regardless, the device works as expected. Editing after 6 months of use. Changing to 5 stars. I've finished a bathroom tiling project, an accent wall and hung many frames. I'm always impressed with how things turn out. Bang for buck, this is a great product. This is my first self-leveling laser level. Perhaps my comments are universal across the style of level. The pendulum inside is sensitive and takes some time to settle - which is understandable. I wish there was a position lock to eliminate the laser wobble as you move around the room. I attached using the provided mount to a door to get the height I needed in my small bathroom. It was nice to have in that scenario, but I find its use limiting. Making adjustments was easy, finding a mounting point at the same height as my desired location would have involved moving furniture around in other projects. I stick it on the tripod every chances I get.
A**Z
Es una muy buena opción para nivelar alacenas aéreas me servirá de maravilla en mi trabajo es lo que necesitaba llegó muy rápido un día antes de esperado completamente nuevo muy bien enpacado y con su empaque horinal quedó muy contento con mi compra la marca siempre es garantía 10 de 10.
F**S
Nivel Perfecto, funcional y fácil de utilizar
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