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Internet #207134022

Model #GLL 30 S

Store SKU #1001241661

30 ft. Cross Line Laser Level Self Leveling with 360 Degree Flexible Mounting Device and Carrying Pouch

  • Replaces multiple tools for all leveling and alignment projects
  • Visible line range of 30 ft. with ±5/16 in. accuracy up to 30 ft.
  • MM 2 mount for easy quick setup, attaches to multiple surfaces
  • See More Details

Frequently Bought Together


Product Overview

Bosch GLL 30 S clipped and locked onto ladder for secure height adjustment and precision leveling.

Precision Leveling

Micro-fine height adjustment, enabling the user to adjust the working height of the device, then lock it.

Bosch GLL 30 S locked and angled on stairs to align with stair railing installation.

Installation Time Saver

Cross-line laser projection (level and plumb) and wide coverage is ideal for alignment of drop ceiling, HVAC, tile, electrical, and cabinet installations.

Bosch GLL 30 S using Smart Pendulum System with level lock to ensure levelled lines on wall.

Smart Pendulum System

The GLL 30 S cross level also features a Smart Pendulum System with level lock that self adjusts and shows you when you're no longer level.

Close up image of Bosch GLL 30 S.

Leveling Efficiency

The Bosch GLL 30 S projects cross lines with an integrated one-switch locking pendulum, adding value to a typical line laser.

Product image of Bosch GLL 30 S.

Smart Leveling

The Bosch GLL 30 S Cross-Line Laser self-levels so the operator doesn't have to manually level the tool.

Bosch GLL 30 S with MM 2 flexible mounting device, belt pouch, and two AA batteries.

Compact Design

Easy to use and easy to store.

Product image of Bosch MM 2 Flexible Mounting Device.

Flexible Mount

The kit includes the MM 2 Flexible Mounting Device, which clamps to multiple surfaces and provides a rotating 360-degree neck.

Infographic showing pendulum swinging.

Smart Pendulum

Smart Pendulum System features self-leveling function and indication for an out-of-level condition

Infographic of target.

Fast and Accurate

Projects bright lines with +/- 5/16-in. accuracy at 30-ft.

Infographic of laser level clamp for stable grip on thin and thick surfaces.

Versatile Clamp

Stable grip on thin and thick surfaces from 1/2 In. to 2-1/4 In. thick

Infographic of lock indicating secured angled mode on tool.

Angled Mode

Allows the user to tilt the tool for straight lines at any angle

Infographic of cross lines.

Cross-Line Mode

Projects two very bright lines that are precisely level and plumb, for a wide array of level

Infographic of feather indicating lightweight design.


This is a compact, easy-to-carry laser constructed with a comfortable and soft-grip design

The Bosch GLL 30 S Self-Leveling Cross-Line Laser Kit provides a tool that projects two lines, making a cross-line projection, for a wide array of level and align uses. This versatility makes it more valuable than a typical line laser. With top-notch accuracy and 1-switch operation, the user's leveling and alignment tasks are done quickly and correctly. The laser lines are visible up to 30 ft. The Smart Pendulum System self-levels and indicates out-of-level condition to help ensure an accurate layout. The pendulum system locks when switched off, to assure secure tool transport. The included MM 2 Flexible Mounting Device provides micro fine height adjustment and it allows the laser to be clamped on virtually any surface from 1/2 in. to 2-1/4 in. thick, for level lines at any height. This kit includes a belt pouch for easy carry-along accessibility.
  • Cross-line mode projects 2 very bright lines that are level and plumb
  • MM 2 flexible mounting device clamps to multiple surfaces and provides micro fine height adjustment
  • Smart pendulum system self-levels and indicates out-of-level condition
  • Secure transport pendulum locks when switched off
  • Ergonomic, compact and lightweight, easy to use, easy to store
  • Features 1/4 in. 20 tripod thread for use with MM 2 mount, BM 3 magnetic mounting bracket or tripod
  • Belt pouch for convenient transport and easy accessibility
  • Includes: MM 2 flexible mounting device, belt pouch and AA batteries

  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name24 in. Line Generator Digital Laser Level30 ft. Cross Line Laser Level Self Leveling with 360 Degree Flexible Mounting Device and Carrying Pouch40 ft. Green Cross Line Laser Level Self Leveling with VisiMax Technology, 360 Degree Mounting Device and Carrying Pouch50 ft. Cross Line Laser Level Self Leveling with VisiMax Technology, L-Bracket Adjustable Mount and Hard Carrying Case
Measurement Accuracy (in.)±1/16 in.±1/8 in.±1/8 in.±1/8 in.
Laser Level Mounting MethodWallTripod,WallTripod,WallTripod,Wall
Number of Measurements1006
FeaturesNo Additional FeaturesHand-Held,Self-LevelingRotating,Self-LevelingHand-Held
Max Laser Distance (ft.)25 ft.30 ft.40 ft.50 ft.
Battery Type RequiredAAAAAAAAA
Compatible Battery TypeAAA BatteriesAA BatteriesAA BatteriesAA Batteries
View ProductView ProductView ProductView Product



Product Depth (in.)
Product Height (in.)
Product Length (in.)
Product Width (in.)


Battery Type Required
Compatible Battery Type
AA Batteries
Hand Tool Type
Laser Level
Laser Color
Laser Level Mounting Method
Max Laser Distance (ft.)
30 ft.
Measurement Accuracy (in.)
±1/8 in.
Number of Batteries Required
Number of beams
Number of Measurements
Tools Product Type
Hand Tool

Warranty / Certifications

Manufacturer Warranty
2 Years

Questions & Answers


what's the distance from the horizontal laser line to the actual bottom of the unit?

Asked by scott November 28, 2020

The distance of the horizontal laser line of GLL30S to the bottom is approximately 1.0". For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.

how can it do offset levels like in the example picture of the guy doing the stair rails? Won't i...

Asked by pookguy88 October 8, 2020

It doesn't do offset levels!!! The photo is VERY misleading! Once you tilt it at an angle the unit will repeatedly blink, 1 sec on, 1 sec off. The photo you provide (and which is provided on the box) must have been taken during the 1 second that the level was on. It's incredibly annoying to use in this manner and basically worthless for this purpose. I am taking mine back to the store for a refund.

Where is this made?

Asked by BobVilla October 7, 2020

The country of origin for the GLL30S Laser Tool is in China. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.

I'm new to using laser levels... but I want to use one to hang photos on a tall wall (2 layers of...

Asked by Lynda September 2, 2020

I think I know what you mean. The laser will have to be at the height you want. It points straight out and can't be tilted up. I'm definitely not an expert on lasers but that's what this one does. I would prefer to have this laser over the "wall one" as I feel this one is more versatile. I'd just get a ladder and use the included grabber arm to mount to one of the legs and you're good to go. Hope this helps.

could I set on floor and use a target to move around floor to check for level floor

Asked by pete June 8, 2020

Yes, you could

Is this for actually leveling or to just make a straight line?

Asked by Joe April 6, 2020

Yes, actual leveling. The one caveat is when you are doing an intentional incline such as for a staircase railing it will not be "level" but it will be straight. But when it is oriented close to normal in reference to the ground (i.e. +/- a couple of degrees from 0 degrees incline) it will auto-correct the true level because it has a gimbel inside that will release and relock in place when it detects it's within those couple of degrees of 0.

Will this attach to a standard photography tripod? Hate the idea of having to purchase a special ...

Asked by Mike August 26, 2019

Yes. 1/4"-20 thread size is the standard.

Can you use it for drop ceilings

Asked by Serg July 11, 2019

Hi there! The GLL 30 S Cross Line Laser Level only projects laser in front. You will be needing the 360 degree plane laser for your application. You may check GLL3-330C or GLL2-80. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.

I know these laser levels cannot be good for the eyesight but my question is how bad are they. I ...

Asked by Levelit November 22, 2018

No looking at the beam of light on the wall will not hurt your eyes. Never look into any lazer projector. Always read and follow the warnings before using any tool.

how do you put it in manual mode just has an on and off switch

Asked by jeff1 September 20, 2018

Thank you for your question. The GLL 30 S Self Leveling tool doesn't have a manual mode feature. The Smart Pendulum System self-levels and indicates out-of-level condition to help ensure an accurate layout. For further assistance, contact us at 1-877(BOSCH99) or 1-877-267-2499 from Mon-Fri 7A-7P CST.

30 ft. Cross Line Laser Level Self Leveling with 360 Degree Flexible Mounting Device and Carrying Pouch - page 2

Customer Reviews

  • 3.7
    out of 387 reviews
  • 72% recommend this product
Filter by:
Showing 1-10 of 387 reviews
great buy
Fantastic laser level and a must for any handyman or diy’er. We used it to get a starigjt line on laminate flooring over about a 35’ span. Worked great.
by crazystang70
1 person found this helpful
Missing the Tool Bag
Works well but beam is a bit narrow. Not a problem for handy man jobs. My only complaint is that it didn’t come with the tool bag advertised. When I purchased the product in store, I showed the store associate the product on the website and he led me to the product location. I verbally asked the store associate to confirm it came with a tool bag which he confirmed it did. Brought it home to unpack and there was no such tool bag in the box. It would be a useful piece to keep a guy organized and sane!
by stef
Response from BoschToolsSep 25, 2020
Hi there! I apologized for the experience you had in purchasing GLL 30 S. This unit comes with;
(1) MM 2 Flexible Mounting Device
(2) AA Batteries
(1) Belt Pouch
We apologized for the confusion. If the store claim that it comes with a tool bag, kindly contact them directly. If you have any tool concern, please contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.
I bought this lazer level as it was on sale and It featured what I was looking for. So it is simp...
I bought this lazer level as it was on sale and It featured what I was looking for. So it is simple to use. It turns on with a slide switch and it auto levels projecting the lazer. If the device is more than 3 degrees out of level the lazer flashes. Pros; the device does come with a handy clamp that I have not used. However it is also fitted with a 1/4 in threaded attach point on the bottom that is compatible with any standard camera tripod, so I was able to use what I already owned for a base. Silly Con; The device came with a very small bag to store the lazer level. But it's only big enough to squeeze in just the lazer, that handy clamp is on it's own no way to store them together. I like it. I know I will use it for years. It feels well made for what I paid for it, it's not heavy duty or armored so I don't think it could handle abuse. Dosen't come with batteries, need 2 AA
by Idoitmyself
Awesome product! Worked great right out of the box! I used it to level the kitchen cabinets for...
Awesome product! Worked great right out of the box! I used it to level the kitchen cabinets for new counter top. The guys also used it when welding the staircase you can see in the background. It's my newest favorite tool!
by Ed
very good , works well , thx
very good , works well , thx
by mcaccess
Worked out great for hanging my wood rack from the ceiling! Nothing is straight/level when workin...
Worked out great for hanging my wood rack from the ceiling! Nothing is straight/level when working in a building erected in 1838. This helped to get framework level and plumb.
by HomeDepotCustomer
Good for vertical lines, not so great otherwise
I used this primarily to mark and plan for some stripes that I wanted to paint on a bedroom wall. I was able to attach the mount to my ladder on one side of the room and align the laser on the opposite wall to be able to tape the planned stripe edges. The stripes were horizontal, so the laser worked well. The self-leveling feature is nice. I've had other lasers with a bubble level that ended up getting jarred or knocked around and the bubble and the laser were no longer lined up together. The self-leveling function is achieved with a hanging, pendulum-style light source, making it easy to get a level horizontal and vertical line. As convenient as the self-leveling feature is, the device leaves some things to be desired. Trying to get a straight line at any sort of angle does not work well. As soon as the whole unit is tilted too far left or right, the laser starts blinking as a warning that it cannot self-level. It's a long, slow blink, so it won't cause a seizure, but it's a little difficult to work with effectively and use it at an angle. The horizontal line is also considerably shorter than the vertical line. At five feet from the wall, the horizontal line is only 8 feet long, but the vertical line runs across the floor, up the wall and back across the ceiling. It's a design issue with the laser. The lens of the unit is tall, not wide, so the laser will essentially span a vertical surface, but cannot cover a very wide horizontal space.
by jswobe
6 people found this helpful
Truly Handy Self-Leveling Laser Line Projector
I wasn't quite sure at first how useful this would be, but as I got it unpackaged, I started thinking of even more uses for it. But first back to the device itself. The device has a nice weight to it that gives the works inside the ability to find it's own level within the lighter housing, That housing has a threaded hole to accept a standard tripod mount. The level comes with a very unique articulating arm that will fasten to many things - ladder steps, bookshelves, countertops - be creative, to give you a surface on which to mount the laser level. The arm can mount on a vertical or horizontal surface because the near infinitely articulable arms on it will allow the laser device to get close enough to level to flash perfectly level horizontal and vertical lines. It's a very super device with incorporation of the vertical and horizontal lines projection, and the unique base that can attach just about anywhere and give you a stable place from which to shoot your lines. I strongly recommend this laser level!
by DrDave
1 person found this helpful
Cool Design and Function
This is a very cool laser level. The basic design is similar to a bird cage swing. The laser hangs from inside the case, this gives the laser some room to self level. The laser can be out of level up to 4 degrees in any direction but it still gives true level and plum lines. If you're out of level or plum more than the 4 degrees the laser flashes letting you know it needs to be set closer to level. The laser can be setup on most surfaces, with the included clamp and swivel. The clamp lets you secure the laser to a board or pipe, almost any surface can be used to clamp too. The clamps swivels allows the laser to be leveled once the clamp is secured in place. I set the laser up on a table and shot down a hallway to see how accurate the level and plum lines are. I found that this little laser is dead on in both level and plum at the advertised 30'. The laser lines are bright enough to be easily seen indoors and away from direct sunlight (See Photos). This is a great little laser that is super easy to use. The included clamping system makes setup a snap. Highly recommend this laser due to its ease of setup, use and accuracy. And the laser comes with a nice storage pouch.
by OutbackJoe
1 person found this helpful
Good consumer grade laser level with a neat difference
Bosch makes some really great laser levels, this looks like it's on the lower end and missing some features that are on some of their more expensive laser levels. You only get a cross hair pattern and it takes some time for the laser to settle because there doesn't seem to be any dampening like on other units. Plus it's not as accurate as some of their other levels. This one is accurate to 5/16" up to 30 ft and one of their more expensive ones is accurate to 1/8" at 30 ft. The range is only 30 feet compared to 300 on some of Bosch's other models. The amount of light in the room will be a factor. Even at 10' the project line seems a bit thick so just be consistent with which edge of the line you're referencing. Depending on the type of uses you have for it this model can save you money and it's very well made. If you need to do something like layout a chair rail, line up outlets, mark out cabinets in smaller rooms this can work well. If you need a very accurate way to paint a level stripe on a gymnasium wall, this might not be for you. Just keep that in mind. Unlike other laser levels I've used that have a 3 way switch for on, off and lock this one only has a 2 way switch for on and off. None of the laser levels I've seen level from any position, you have to get them a bit close and then they level themselves. If you just want to project a line on a wall that's not level you'd switch it to lock and point it anywhere you want. If you don't switch them to lock the ones I've used will not even display cross hairs. The Bosch GLL 30 works differently. When it's close to level it will level itself. When it's not close to level it still projects a line but it will blink on and off (2 seconds each) to let you know it can't level itself. I find that makes it easier to level without the aid of an external bubble level. I can still project a line that's not level as long as it's outside the range where it tries to level itself. Not a big drawback since it's rare you want to lay something out almost level but not compared to how often you'll want to layout something either level or completely not level. You will have to deal with the blinking when doing anything off level though. Quality is good and I like the clamp. It's a little slower to use until you get used to it but it has rubber over the grips to protect what you clamp it to and it can clamp on 2x lumber as well as round pipes or tubes. The best way to use the clamp is to use one hand to compress the spring jaws of the clamp until it's tight up against the surface and then use a finger from your other hand to spin the knob. Can even do it with a finger from the same hand. Just need to give it a good flick so it spins on it's own. Makes the clamp pretty fast to use that way. Same thing when you're trying to loosen the clamp. Bring the jaws in with your hand to take tension off the screw and then the knob spins very fast. Ideally you should get a nice tripod to mount it on. There's a standard 1/4"-20 threaded insert on the bottom that will fit most tripods. On a tripod you can easily raise or lower the height to where you want it faster. If you want the quality of a Bosch laser level but can live without some of the features in the more expensive laser levels, this is a good choice. If you plan on using it often though invest in a good tripod too. Just try to keep the face of the level parallel to the surface you're projecting it on, mark where on the wall you want the line to be (34.5" above the high spot in the floor for base kitchen cabinets as an example) then project the beam so it hits that mark and make sure it's not blinking.
by Tom3
4 people found this helpful
Showing 1-10 of 387 reviews