Brand | BOSCH |
---|---|
Material | Plastic, Rubber |
Color | Blue |
Product Dimensions | 4.1"L x 2.5"W |
Style | 50ft |
Item Weight | 12.32 ounces |
Operation Mode | Automatic |
UPC | 000346811513 |
Manufacturer | BOSCH |
Part Number | GLL50-20 |
Item Weight | 12.3 ounces |
Country of Origin | China |
Item model number | GLL50-20 |
Power Source | Battery Powered |
Item Package Quantity | 1 |
Special Features | self-leveling |
Included Components | GLL50-20 Self-Leveling Cross-Line Laser, Integrated Magnetic Mount, (2) AA Batteries |
Batteries Included? | Yes |
Batteries Required? | Yes |
Battery Cell Type | Alkaline |
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 |
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- Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
- 24/7 support when you need it.
- Quick, easy, and frustration-free claims.
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BOSCH GLL50-20 50 Ft Self-Leveling Cross-Line Laser, Includes Integrated Magnetic Mount & 2 AA Batteries
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Learn more
Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Purchase options and add-ons
Brand | BOSCH |
Material | Plastic, Rubber |
Color | Blue |
Product Dimensions | 4.1"L x 2.5"W |
Style | 50ft |
About this item
- POWER FLEXIBILITY: The laser works with two AA batteries (included) or Bosch's 3.7V Lithium-Ion 1.0 Ah battery (sold separately), for less downtime on the job.
- DURABLE: The laser is IP55 rated to withstand tough jobsite conditions such as rain or dust.
- ACCURACY: The laser has bright, thin lines that level within 5/16 inch accuract at 30 feet.
- SELF-LEVELING- The smart pendulum system self levels and indicates out-of-level condition by blinking and locks when switched off for secure transport.
- EASY-TO-USE: The laser is egonomic, compact and lightweight for easy use and storage.
- CLASS II LASER: 630 - 650 nm; <5 mW
Competitively priced item
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INTERIOR LEVELING
Precise lines with high visibility for the professional user. Fast horizontal and vertical alignment of lines: Effortless and highly precise with the self-leveling line lasers from Bosch. Sturdy, robust, practice-oriented – the easy-to-operate line lasers quickly deliver precise results both indoors and outdoors.
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From the manufacturer

POWER FLEXIBILITY
Works with (2) AA batteries (included) or Bosch’s 3.7V Lithium-Ion 1.0 Ah battery (sold separately), for less downtime on the job.
JOBSITE TOUGH CONSTRUCTION
IP 55 rating offers dust and water resistance.
INTEGRATED MULTIPURPOSE LASER MOUNT
Positions and mounts with magnets or threaded mounts (1/4 In. – 20).
BRIGHT, THIN LINES WITH 50 FT. RANGE
To level within 5/16 In. accuracy at 30 Ft. range.
CROSS-LINE MODE
Projects two bright, level and plumb lines.
SMART PENDULUM SYSTEM
Self levels, indicates out-of-level condition by blinking and locks when switched off for secure transport.
FULL RUBBER OVERMOLD HOUSING
Helps protect every major impact point, with a design similar to a roll cage.
ERGONOMIC, COMPACT AND LIGHTWEIGHT
Making the laser easy to use and easy to store.
SECURE LASER TRANSPORT
After switching off, pendulum locks for secure transport.
Product information
Technical Details
Additional Information
ASIN | B0CKJXX4XR |
---|---|
Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank |
|
Date First Available | October 5, 2023 |
Warranty & Support
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BOSCH GLL50-20 50 Ft Self-Leveling Cross-Line Laser, Includes Integrated Magnetic Mount & 2 AA Batteries
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Product Description
The Bosch GLL50-20 Self-Leveling Cross-Line Laser features a 50 feet range and cross-line mode that projects both horizontal and vertical red lines, allowing for leveling with a 5/16 inch accuracy at 30 feet. With its power flexibility, operate using the included AA batteries or purchase Bosch's 3.7V Lithium-Ion 1.0 Ah Battery (sold separately) that allows use of the tool while charging to diminish downtime. Its ergonomic, compact, lightweight design and IP55 dust- and water-resistant rating provide for both comfortable and dependable operation. The full rubber overmold housing helps protect every major impact point, acting like a roll cage for safeguarding. Equipped with a Smart Pendulum System, the tool self levels, will indicate any out-of-level condition by blinking and then locks when switched off for secure transport. Simply tilt the laser to use the lines at an angle with ease. Position the tool with the included integrated magnetic mount or utilize the 1/4 inch threading mount that fits with like-sized tripods.
Top Brand: BOSCH
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Customer Ratings | ||||||
Sold By | Amazon.com | Amazon.com | Amazon.com | Amazon.com | Amazon.com | HeltonToolandHome |
material | Plastic, Rubber | Stainless Steel | Rubber | Plastic | Glass, Rubber | Alloy Steel |
operation mode | Automatic | Automatic | Automatic | Automatic | Automatic | Automatic |
power source | Battery Powered | Battery Powered | Battery Powered | Battery Powered | Battery Powered | — |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the laser level works well indoors and appreciate its ease of use, particularly for garage shelving installation. The laser visibility receives mixed feedback - while it's bright during the day, it's hard to see in bright sunlight. Moreover, the self-leveling feature and build quality also get mixed reviews, with some finding it reliable while others report it doesn't level properly and breaks easily. Additionally, the blinking feature is problematic, as the laser blinks continuously, and opinions on value are divided between those who consider it good for the price and those who find it not worth the money.
AI Generated from the text of customer reviews
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Customers find that the laser level works well, particularly indoors, with one customer noting its compatibility with camera tripods.
"Works great. My son had bought a cheaper one and it did not lock in as good. The likes were not study. This one lines up good and stays in place." Read more
"It works really well. Swivel, magnet, stability, all is great" Read more
"...However, this level lacks a manual mode, so it's not useful for projects involving ceiling work (unless you don't mind flashing lights)...." Read more
"Excelente producto." Read more
Customers find the laser level easy to use, particularly for garage shelving installation and mounting.
"...Very easy with this level as I could adjust the vertical line to where I wanted the shelves to be on the right and then I adjusted the cross-hair..." Read more
"...use 3 of these for i installing or fabricating and it makes your job easier. all the good lasers are expensive...." Read more
"It's pretty easy to use, but it seems to work best when the laser is at the same height as the location you're measuring, so if it's up high, you'll..." Read more
"Very useful tool extremely easy to use. Makes it easy to install ítems perfectly level with the floor..." Read more
Customers find the laser level to be a great addition to their tools, particularly useful for remodeling jobs and handy around the house.
"...the magnet is good and useful. red lasers oc not as visible as the greens but in a shop setting it works great" Read more
"AWESOME for the handyman. Why did I wait so long before I got this great tool? ----> Blinds, pictures, shelves, wall mounts for T.V.'s, d.i.y...." Read more
"This has been very helpful with our kitchen remodel" Read more
"...The fact that you can work on two different axis at the same time is so helpful and convenient...." Read more
Customers have mixed opinions about the laser level's value for money, with some finding it a great product for the price while others consider it a total waste of money.
"...Great for around the house/ light duty use. Well worth the price." Read more
"This laser level is perfect for occasional use that isn't complex...." Read more
"...The likes were not study. This one lines up good and stays in place." Read more
"...It's so worth it." Read more
Customers have mixed opinions about the laser level's build quality, with some praising its construction while others report it completely breaking on them.
"...Bosch is a name brand that for me has shown usefulness and quality in the products I have purchased from them." Read more
"...all the good lasers are expensive. this one is obviously not as precise and as well made but i’ll buy these when they go on sale...." Read more
"It works really well. Swivel, magnet, stability, all is great" Read more
"Great quality. And the laser is very fine not blurry like other brands" Read more
Customers report issues with the laser level's blinking behavior, noting that it never stops and indicates when it's not level.
"...level lines (and have verified through other means) and it blinks as if it isn't level. Annoying, but for the little I use it, it's tolerable." Read more
"...and need to cram it into a weird spot to get that line, the flashing is annoying. Other than that minor annoyance - great product!" Read more
"...The blinking interval could be shortened, but it's not a big deal. The big deal is the mount that comes with it...." Read more
"...Any imperfection and it will start flashing. The laser cannot be locked when turned on, so there’s no angling it or pointing it upwards...." Read more
Reviews with images

Very useful tool extremely easy to use
Top reviews from the United States
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- Reviewed in the United States on May 15, 2025Style: 50ftVerified PurchaseThis laser level is awesome!
I purchased this to help install a TV Mount and some overhead storage racks in the garage it has 1/4-20 camera tripod threads for attachment to a tripod for shooting the laser cross hairs vertically for overhead work.
Bosch is a name brand that for me has shown usefulness and quality in the products I have purchased from them.
- Reviewed in the United States on May 27, 2025Style: 50ftVerified PurchaseWorks great. My son had bought a cheaper one and it did not lock in as good. The likes were not study. This one lines up good and stays in place.
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Reviewed in the United States on February 8, 2025Bueno... solo que siempre es Cruz... en la actualidad tienen cruz, línea horizontal, línea vertical... según lo necesites... pero ayuda... por el precio, no puedo exigir tanto.
- Reviewed in the United States on May 28, 2025Style: 50ftVerified PurchaseIt works really well. Swivel, magnet, stability, all is great
- Reviewed in the United States on January 29, 2018I tend to put a lot of effort into trying to get shelves, pictures, and other household projects to be level, so I use laser levels quite a bit. This Bosch unit is nice in that it has a nice clear beam even in daylight. It is also a step up from cheaper units I've used in that it projects a cross pattern for aligning both in vertical and horizontal axes. For example, I mounted a column of shelves on the left side of a wall and wanted another column on the right side. Very easy with this level as I could adjust the vertical line to where I wanted the shelves to be on the right and then I adjusted the cross-hair from a horizontal aspect to line up with the shelves on the left. Easy.
You'll likely find that using a tripod is the easiest way to mount this unit for use, though it does come with a handy clip attachment if there is something stationary nearby that it can be mounted to. The clip can be easily removed when not needed.
There does seem to be one flaw however. When the device is within 4 degrees of level it uses an internal pendulum to auto-level itself, which is great. Most of the time this is the way to use it. When it is rotated more than 4 degrees, the beam stays on so that you can self-align for more diagonal oriented angles. Again, nice. However if you want to self-align with the laser but want to use it still within 4 degrees of level, there is no way to disengage the auto-leveling feature and just leave the laser on. There are times when I want to use the laser for a straight/perpendicular line but don't necessarily want it to be level with the horizon. There doesn't seem to be a way other than being at an angle greater than 4 degrees. It seems like it would have been easy to disengage the pendulum (which happens when you shut off the laser anyway) but leave the laser on for use.
Not something I thought of before I purchased it. Maybe those more handy than me would find this to be obvious or maybe suggest this isn't the right tool for this kind of job but I'm just an amateur when it comes to home projects and spending quite a bit more for a level than I had to, I see this as a downside of using the item.
- Reviewed in the United States on May 20, 2025Style: 50ftVerified PurchaseThe product was exactly as described. I would like to change the batteries for a rechargeable ones.
- Reviewed in the United States on February 1, 2025Style: 50ftVerified Purchasehonestly, wow. won't ever go back to bubble levels again.
i used it to hang curtains near the ceiling. at first, i pulled it out of the box and thought to myself "how do i get this high enough?". initially i tried sticking it to my ladder, but it didn't go high enough for the horizontal laser to line up. then i realized you can freaking tilt this thing and it will auto-level. so you can have it a few feet below the object you're trying to level, aim it, and it will produce lines up near the ceiling. pulled out my bubble level to compare and it was always dead-on. crazy.
but really, it's best with a tripod. i have a Smallrig RA-S280, about $60, which i already had lying around and this Bosch uses standard 1/4" tripod thread so it worked. being able to height adjust with the tripod made it far more reliable as if the mounting surface is even slightly wobbly, the laser will be unreliable. i also love the magnetic mount option for added flexibility where a tripod might not fit.
Top reviews from other countries
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Gpe LunaReviewed in Mexico on November 21, 2024
5.0 out of 5 stars Buen producto
Buen producto, funcional
- GordReviewed in Canada on June 6, 2025
5.0 out of 5 stars Good things
Style: 50ftVerified PurchaseGood things
- Deal DaddyReviewed in Canada on September 3, 2020
5.0 out of 5 stars A Bit flimsy
I got this for 30~ CAD so I might be over hyping the value.
Pretty good device, has a clamp thing that is pretty solid andcan latch on to most things (like a door / Counter) but in areas where theres nothing to latch, it can be tricky to get the horizontal line where you want it.
Overall pretty easy to use if you get it for 20-40$ i think it is well worth it.
- Moisés R.Reviewed in Mexico on March 7, 2025
5.0 out of 5 stars Excelente
Style: 50ftVerified PurchaseExcelente producto.
- JohnnyReviewed in Canada on May 19, 2025
5.0 out of 5 stars Laser level
Style: 50ftVerified PurchasePurchase this on sale on Amazon along with a tripod. Works excellent.