Black Diamond Magnetron GridLock

Priced: $22.49 - $29.95 Rated:   - 4 stars out of 5 by 19 reviews.
Black Diamond Magnetron GridLock
Zoom In
Available Colors:
Al's Sports $22.49
24% off
Regularly: $29.99 $23.95
20% off
Regularly: $29.96 $23.96
20% off
Regularly: $29.95
Gearx $23.96
20% off
Regularly: $29.95
SunnySports $24.95
16% off
Regularly: $29.96
Massey's Outfitters $28.95
3% off
Regularly: $29.96
Appalachain Outdoors $29.95 $29.95
Campmor $29.95
Eastern Mountain Sports (EMS) $29.95
Moosejaw $29.95
Mountain Gear $29.95
Mountains Plus Outdoor Gear $29.95
Paragon Sports $29.95
REI $29.95 $29.95
Visit our Daily Deals for great products at low prices.
Black Diamond Magnetron GridLock -
Black Diamond Magnetron Gridlock Carabiners Features.

Black Diamond Magnetron Gridlock Carabiners.
The Black Diamond Magnetron Gridlock Carabiners are revolutionary and a must-have addition to your climbing gear. With the trademark Magnetron technology, the gate uses two magnetic arms, with a steel insert to hold it securely. This easy-to-use system comes with auto-locking technology and the entire mechanism can be operated with just one hand in case of emergencies. The all new hot-forged construction also enables the unique gridlock shape, critically trapping the belay loop and eliminating rope interference and cross-loading. The I-Beam spine helps to provide greater tensile strength and ensures a smooth and continuous rope feed. The harness is lightweight at only 3 oz. and sturdy with an open gate strength of 1,798 lbf., making it durable and easy to carry. The Black Diamond Magnetron Gridlock Carabiner is a thing you can always depend on while mountain climbing.
This product can only be shipped to U.S. addresses.

Key Features.


  • Steel insert in the nose for super-secure, interference-free closure
  • GridLock design features an extension at the bottom of the gate to keep the 'biner properly oriented on your belay loop to avoid cross loading
  • Gate opens by depressing the two arms with thumb and forefinger; can be operated with one hand, and design works equally well for right- and left-handers
  • Magnetic arms on the gate come in assorted colors only; sorry, specific color requests cannot be accommodated
  • Black Diamond Magnetron GridLock Belay locking carabiner has a key lock nose that won't snag on pro, ropes or slings, making the 'biner simple to clip
  • Revolutionary magnetic locking gate features two magnetized arms that repel each other when the gate is open but lock shut when they come in contact with the steel insert in the carabiner's nose
  • Large pear shape allows for a generous gate opening
  • Once open, opposing magnetic fields repel the arms to ensure smooth and reliable gate operation
  • Keylock nose helps prevent your rope from snagging
  • Magnetic gate doesn't have components that can freeze shut or clog with sand
  • With magnetic arms in the gate and a steel insert in the nose rather than a twistlock or screwlock, the Magnetron 'biner is simple to operate and totally secure
  • Magnetron Technology uses two magnetic arms in the gate and a steel insert in the carabiner's keylock nose to create an ultra-secure, self-clearing and redundant locking mechanism
  • I-beam spine transitions into a rounded rope-bearing surface for smooth belaying and rappelling
  • colors may vary upon arrival
  • Minor Axis - 7kN (1574lbf)
  • Gate closed - 22kN (4946lbf)
  • Gate open - 8kN (1798lbf)
  • The magnetron can easily be used with either hand
  • Combine that with the innovative Black Diamond GridLock shape, which traps the belay loop to eliminate cross-loading, and the Magnetron GridLock is the ultimate belay carabiner
  • Hot-forging process allows the metal to be moved around and formed into intricate shapes; these shapes can ease handling and reduce weight
  • Symmetric design lets you open the gate easily with just 1 hand, either your right or left
  • Hot-forged for maximum durability
The Black Diamond Gridlock Magnetron Carabiner combines maximum security and ease of use like never before. The Black Diamond Magnetron GridLock uses the power of magnets to reinvent the auto-locking carabiner. Magnetron Technology uses two magnetic arms in the gate and a steel insert in the carabiner's keylock nose to create an ultra-secure, self-clearing and redundant locking mechanism that can be easily used with either hand. Combine that with our innovative GridLock shape, which traps the belay loop to eliminate cross-loading, and the Magnetron GridLock is the ultimate belay carabiner.
The Magnetron GridLock carabiner is Black Diamond's newist magnetic locking carabiner, adding another level of safety and ease while belaying. Perfect year round, the Magnetron Gridlock doesn't freeze in the winter or clog from sand or dirt. This carabiner also features separated bottom and top so as to further eliminate the risk of cross-loading. The magnetron Gridlock's keylock nose also helps prevent your rope from snagging. Grab the Magnetron GridLock from Black Diamond and hit the rock walls in with confidence.

Featuring Black Diamond's new magnetic locking mechanism, the Magnetron GridLock carabiner brings a new level of ease and safety to belay-specific carabiners. This unique gate design doesn't freeze in the winter and doesn't clog up with sand and dirt the way a screwgate does. In addition to the one-of-a-kind gate, the Magnetron GridLock also has a separated bottom and top so as to completely eliminate the chances of cross-loading, because this is one piece of gear that absolutely cannot fail. To further ensure that its safety, Black Diamond hot-forged this carabiner to make it as tough as it can be. As a final touch, this carabiner also got a keylock nose to eliminate snags when you're taking your friend off belay.


The reinvention of the auto-locking carabiner has arrived. The Black Diamond Magnetron GridLock Belay locking carabiner uses magnets for secure locking and unparalleled ease of use.


Appalachain Outdoors
Once again; Black Diamond Equipment is not satisfied with what is perceived as perfect. They have now introduced the new Magnetron Gridlock carabiner. This new revolutionary creation does not only offer maximum security but it also offers ease of use like never seen before.
Mountain Gear
Feel the power, the magnetic power.
Want it cheaper? Set your own price.
Enter the price you want to pay and we'll email or text you if we find a store that will sell it for that amount:
Price: $
Your email:
Cell number: (optional, for text message)
Learn how offers work...
Average Price History: Price History
Review RatingNumber of Reviews
Carabiner Shape:HMS (Oversized)
Carabiner Size:Standard
Carabiner type:Locking carabiner
Closed Gate Strength:4.946 lbf / 22 kN
Country of Origin:USA
Frame Shape:Modified D
Gate Clearance:21 mm
Gate Closed Strength:22 kN
Gate Open Strength:8 kN
Gate Opening:21 mm (.83 in)
Gate Opening Measurement:21 mm
Gate Style:Straight
Gate Type:Magnetron
Gate opeining:21 mm / 0.83 in
Gate open clearance:21 millimeters
Key Lock Gate:Yes
Locking Mechanism:Auto-Lock
Major Axis:22 kN
Major Axis Strength (Closed):22 kN
Major Axis Strength (Open):8 kN
Major Axis kN:22 kN
Minor Axis Strength:1.574 lbf / 7 kN
Minor Axis kN:7 kN
Open Gate Strength:1.798 lbf / 8 kN
Open Strength kN:8 kN
Strength major axis closed:22 kilonewtons
Strength major axis open:8 kilonewtons
Strength minor axis:7 kilonewtons
Upc, Ean, Isbn:793661164838
Weight:3 oz / 78 g
Weight (Grams):78 g
Compare specifications to related products.

Similar Products:

Black Diamond GridLock CarabinerBlack Diamond GridLock Carabiner$14.97 - $19.95
Black Diamond Magnetron RockLockBlack Diamond Magnetron RockLock$18.74 - $24.95

Subcategories of Carabiners:

Related Categories:

Black Diamond

Black Diamond Magnetron GridLock Reviews:

Positive Reviews:

Great belay carabiner

I'm actually a bit surprised I own this carabiner. First, I'm not usually an early adopter. Second, if something is a bit too clever, I'm usually turned right off. It happened that I wanted a Gridlock, and the Magnetron line had just come out.

The Gridlock format is great; it keeps the carabiner in a known orientation on your belay loop, and you can be certain it's not cross-loaded. It takes a bit of fiddling to get it on and off, but you can do it in one motion with some practice. It's worth it.

The Magnetron part is nice, too. The independent magnetic catches engage smoothly and positively, and Black Diamond are accurate in their claim that the magnets experience their greatest force (i.e., are hardest to open) in the gate-closed position. One thing I had to get away from was the idea that the gate had to support a significant compression (opening) force; the point of a locking biner is not to open inappropriately. I do not see this carabiner coming open by accident under normal circumstances.

My one complaint would be around finish. There are some sharp-ish edges, all on the gate. The retainer section of the gate that sits on your belay loop has sharp edges near the pivot point. As well, the edges around the release buttons could do with some smoothing.

Overall: this is a great piece of kit! Thanks, BD!
kjd at REI on 11/11/2012

I've used this biner a decent amount as a belay biner, primarily with a GriGri 2, and it does its job quite well. The spur totally captures the belay loop, and the magnetron locking system is reliable, quick, and easy to use.
When using this product with a GriGri, the manual recommends capturing the belay device with the spur and leaving the belay loop in the larger opening. This does result in an extra step or two when attempting to take your partner off belay, which is a tad fumbly and obnoxious. I also feel way more likely to drop my Grigri, and probably would not take this multipitching.
I recognize that these are setbacks of the Gridlock, and not the Magnetron locking system, which I like quite a bit despite its added weight.
Also obnoxious about the gridlock is the way that it hangs awkwardly from a gear loop. Blech.
All in all, the Magnetron is super nifty, and works really well, and the Gridlock has its place. This would be a great 2nd belay biner especially safe and foolproof for sport climbing, but I'll keep using a vaporlock or attache screwlock for multipitch.

Simon Hatfield at on 11/22/2012

I have been using this for canyoneering since November 2012 and I haven't had any problems with it till June 2013 when the rope would get wet then sandy in the Zion canyons. While rappelling your carabiner and ATC help clean off the sand from the rope but some sand ends up getting under push tabs of the Magnetron and make it so it freezes up and stays locked. You have to really play with it to loosen up the sand if you don't have water to wash it out with which sucks since this biner is not supposed to freeze up with sand. I haven't had any problems with it not locking though so that is good.
Overall I highly recommend the Magnetron to canyoneers, but if you are in super sandy conditions and using an older rope that holds sand well, beware of it freezing up just like any other locking biner.

Jeff Guest at on 06/11/2013


Owned a regular GridLock for a while now, and whilst I didn't think it could be improved upon, the Magnetron has proved me wrong. Features all the pro's of the original Gridlock (excellent belay radius, never cross loads or inverts) and adds more. The new gate closure is super easy to use, and impossible to not do up - no more forgetting to screw the gate up. Furthermore, its far easier to use than a screwgate whilst wearing gloves, and didn't freeze up once throughout the entire Welsh winter season. However, it is still fiddly to initially align, but that is a problem will all anti cross load carabiners. Its also quite expensive, but don't let either of these minor misdemeanour's put you off, this is an awesome carabiner. A that's saying something - its never usually a piece of kit to get excited about.
IanS at Mountain Gear on 05/05/2013

King of Locking Carabiners

I bought one of these mostly out of curiosity. I thought it would be just another silly feature. After a recent trip to the Wind Rivers, I quickly realized this biner was awesome! It's so fast to get in and out of on rappels! You just let go of the gate and your locked! No constantly checking to see if your screwgate has once again come unscrewed. You're good to go. The gridlock feature is a two step process to get on your belay loop, but if you leave it there while climbing, you don't have to worry about it again. No cross loading too which is huge!
jason at Mountain Gear on 07/07/2013

The gate on the magnetron has the magnets in the gate and when it closes it locks into groves. It can be opened with your finger and thumb just fine.If I did it all again I thing I would get the rocklock version. The gate locks every single time you close it because of the magnets, so it can get annoying to open it to put you gear in, close it to slide the gear down, and then open the gate again to move the gear to the bottom to prevent cross loading. Seems to be quality materials though! I have not had any durability issues.

Cody at on 05/26/2013


Ok - I must admit that I am not a mountain climber. However, when I read about the new Magnetron Gridlock Carabiner - I had to have it. Why? Because it's so cool. Honestly I thought it was a little smaller and was shocked when it arrived. This is the mother of all key rings. I have had many comments about it when noticed hanging from my belt loop.
Only recommendation to Summit [assuming I didn't overlook this when I ordered]: Make color options available. The product was presented in green and arrived in orange.
Jordache at on 01/01/2013

One of the safest out there, IMO

Just ordered this the other week and I can't say how much I love it. No biner is foolproof, now but I'm a lot less worried about a rookie belayer cross-loading the biner or forgetting to lock the gate - if it's closed, it's locked. It's easy to use with one hand. For one of the most frequently used pieces of gear, it's totally worth the price. I can't believe I bothered with screwgates for so long. From now on, all my lockers are going to be Magnetron.
Anson at Mountain Gear on 11/11/2013

Awesome carabiner

The best Gridlock Carabiner I ever used. The highest quality and security. First time I saw it I thought that it is not very secury, but as a QA engineer I tried to open it with the rope in all possible ways. It is impossible! Now you should never forgot to screw your screwgate carabiner. It's a little bit expensive against other models, but every $ you spend on this carabiner worth it!
Stanislav at Mountain Gear on 06/06/2013

Excellent, no fuss carabiner

I was looking for something to get away from double locking spring loaded biners. This delivered. I was a little suspicious because it's so different and looked too easy to use online. Truth is, it is easy to use. It's also very safe as far as I can tell. If your hesitant on getting one, don't be... it's well worth it
Eric at Mountain Gear on 10/10/2013

Negative Reviews:

Not the best combination

I like both the features of this carabiner: the Magnetron auto-lock mechanism and the gridlock internal gate. However, they don't work well together. The Magnetron is eager to close and not super easy to open (generally a good thing for a locking mechanism!). The Gridlock requires you to open the gate several times:

Once to get your belay loop into the main chamber
Again to get your belay loop into the keeper chamber
Again to get your belay device into the main chamber
(Possibly again to get the rope in, if you didn't pre-load the belay device with the rope).

That's a big hassle. It's not too bad for top-roping since once you get set up you only have to repeat the last step to get on or off the rope. But for multi-pitch, where the belay device is coming on and off your harness several times, it becomes a time suck.

If I could purchase again I would choose the screw-lock version since that's very easy to open the gate multiple times while unlocked.
Once a climber at REI on 11/11/2013

Neutral Reviews:

I love the gridlock, but am less enamored with this one. I like the idea, but it doesn't operate as smooth as I would like it too. I haven't used it in a canyon yet, but hopefully that will change my mind.

greg brinkman at on 07/12/2013