Black Diamond Magnetron RockLock

Priced: $18.74 - $24.95 Rated:   - 4 stars out of 5 by 39 reviews.
Black Diamond Magnetron RockLock
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Color: Mocha
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Black Diamond Magnetron RockLock -
Black Diamond Magnetron RockLock Carabiners Features.

Black Diamond Magnetron RockLock Carabiners.
The Black Diamond Magnetron RockLock Carabiners are an essential safety component for any climbing or rappelling enthusiast. With its trademark Magnetron technology, the gate of the carabiner uses two magnetic arms, with a steel insert in the key lock nose, to hold the load securely and to maintain an interference-free closure. This helps prevent rope snags, for added safety. It is operable with either hand, making it an essential item to have in an emergency, when both your hands may not be free. Designed with a curved spine, its gate opening is maximized to keep you securely in place, while providing the necessary balance. The original RockLock shape makes this carabiner ideal for belaying. The Black Diamond Magnetron RockLock Carabiner is a must-have addition to your climbing gear.
This product can only be shipped to U.S. addresses.

Key Features.


  • Belay loop is held securely in place when 'biner is opened by the square hinge end
  • RockLock locking carabiners combine maximum security and ease of use like never before
  • Magnetic gate doesn't have components that can freeze shut or clog with sand
  • Hot-forged for maximum durability
  • The classic Black Diamond RockLock shape is ideal for belaying, making anchors or rappelling
  • Innovative design uses 2 magnetic arms in the gate and a steel insert in the nose of the 'biner for secure and simple closure; gate can be opened with 1 hand
  • Gate open - 7kN (1574lbf)
  • colors may vary upon arrival
  • Minor axis - 7kN (1574lbf)
  • Gate closed - 24kN (5395lbf)
  • 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
  • Always read and understand the warnings and instructions that accompany your gear.**
  • Keylock nose helps prevent your rope from snagging
  • Once open, opposing magnetic fields repel the arms to ensure smooth and reliable gate operation
  • Key lock nose 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
  • Slightly curved spine of the Black Diamond Magnetron RockLock locking carabiner maximizes the gate opening
  • 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
The Black Diamond Magnetron Rocklock Carabiner brings a new magnetic design to climbers seeking security, ease of use and non-snagging technology - that's pretty much what every climber wants and needs.
The Black Diamond Magnetron Rocklock 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 easily be used with either hand.
Magnets - not twistlocks or screwlocks.
Magnetic attraction to a steel insert in the carabiner nose keeps two independent arms securely locked.
Locking arms must be individually depressed before the gate can be opened.
Once open, opposing magnetic fields repel the arms to ensure smooth and reliable gate operation.
Symmetrical design allows for easy one-handed operation (right or left)
The classic RockLock shape is ideal for belaying, making anchors or rappelling, and its keylock nose prevents snagging on slings and ropes.
Rest assured that you're secure on the rock with the BD Magnetron Rocklock.

The Black Diamond Magnetron RockLock carabiner uses a truly revolutionary gate that locks shut with magnetic tabs instead of a traditional screw gate. The advantages? Nothing to freeze shut in the winter or to clog up with sand, and you can operate the gate with one hand. Not to mention that this gate is significantly faster to open then traditional locking mechanisms. To top it all off, Black Diamond gave the RockLock carabiner a keylock nose that won't snag on gear, slings, or bolts when you tear down your anchor to head up the next pitch.

FEATURES of the Black Diamond Magnetron RockLock.
SPECIFICATIONS of the Black Diamond Magnetron RockLock.

Appalachain Outdoors
Once again; Black Diamond Equipment is not satisfied with what is perceived as perfect. They have now introduced the new Magnetron Rocklock carabiner. This new revolutionary creation does not only offer maximum security but it also offers ease of use like never seen before.

The Black Diamond Magnetron RockLock locking carabiner uses the power of magnets to give you the security of a locking 'biner with incredible ease of use.


Mountain Gear
Feel the power, the magnetic power. Top 25 Category Product
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Average Price History: Price History
Review RatingNumber of Reviews
Carabiner Shape:Modified D
Carabiner Size:Standard
Carabiner type:Locking carabiner
Closed Gate Strength:24 kN / 5,395 lbf
Color:Mocha with assorted locking arms (purple, green, orange, blue)
Country of Origin:USA
Frame Shape:D
Gate Clearance:21 mm
Gate Closed Strength:24 kN
Gate Open Strength:7 kN
Gate Style:Straight
Gate opeining:21 mm / 0.83 in
Gate open clearance:21 millimeters
Gate opening:21 mm (.83 in)
Gate type:Auto-lock
Key Lock Gate:Yes
Locking Mechanism:Auto-Lock
Major Axis Strength:7 kN (1,574 lbf)
Major Axis Strength (Closed):24 kN
Major Axis Strength (Open):7 kN
Major Axis kN:24 kN
Minor Axis Strength:7 kN / 1,574 lbf
Minor Axis kN:7 kN
Open Gate Strength:7 kN / 1,574 lbf
Open Strength kN:7 kN
Strength major axis closed:24 kilonewtons
Strength major axis open:7 kilonewtons
Strength minor axis:7 kilonewtons
Upc, Ean, Isbn:793661164821
Weight:3.1 oz / 87 g
Weight (Grams):87 g
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Black Diamond

Black Diamond Magnetron RockLock Reviews:

Positive Reviews:

Fantastic biner; 5 stars if lower price

I top-rope indoors with a partner 5-6 hours a week. I bought this to replace my decade old Petzl Attache biner.

As one who detaches/reattaches my belay device every time my partner and I swap out the top-rope, I can tell you that switching to the Magnetron has been well worth the investment: it is a single-hand operation that only takes a second; it is a huge time saver, and I love that.

Standing at 5'5, I was worried that it might be too big for me to use the one-handed operation; testing this in the store, I mastered it rather quickly (although I will say that if my hands were slightly larger, it would be easier).

Before buying this biner, I encourage you to try it in the store and make sure it is something you will like rather than buying it thinking you can return it if you don't like it: REI has to destroy any climbing safety gear that someone buys and returns (even if it was never used).

If the price were around $18, I'd give it 5 stars....but at 2.5 times the cost of other biners, I am giving it 4 stars, but a glowing 4 stars indeed.

If you are climbing outdoors, which has many less biner swaps than a gym, I don't know if you'd find the value that great.
CA Marc at REI on 08/08/2013

Quick One Hand Release Mechanism

The coolness: It can be unlocked in a sigle motion if your hand is large enough. (I have medium sized hands, and I can open it without a problem.) It makes rappelling on a multipich a breeze. And switching belayers has nevere been faster. The greatest concern I think someone would have, is that the carabiner locks in place through the use of magnets. I can assure you that as soon as you use it, you feel how strong and secure the magnets are. The carabiner needs three different actions in a single motion to fully unlock, so the chances of it unlocking on it's own are slim to none.

The Cons: Price is definitely a factor. It is $15 more than a regular screwgate, and $7 more than a twistlock of the same model. I wouldn't buy this if it weren't for the fact that we do climbs where we rappel 10-15 pitches, and those precious minutes screwing and unscrewing add up. Second, it is a bit more difficult for someone with a small hand to unlock it in a single motion. (It was proven to me by my friend who has smaller hands. She still loves having one, nonetheless.)

Overall, only buy this if you need to get off/on belay/rappell in a hurry. Or if you just want to have the coolest magnetic carabiner around.
ALNROX at REI on 11/11/2012

Solid performance

I've been using the Magnetron for a few weeks and have been very pleased. With any new type of technology I'm always a little skeptical of how it will perform in the long-run, and thus far have had no signs that would indicate the locking mechanism could fail.

The only thing that makes me weary is that you can't tell just by taking a quick look at the carabiner if it is locked. You can only make that assumption without physically testing it, though, it has never failed to lock. In contrast, other auto-lockers and twist locks show a red band around the device when unlocked. Because of this, I am hesitate to give this carabiner to a beginner...then again it is pretty fool proof.
Mtn Man Matt at REI on 01/01/2013

Love them

Innovation at its best. Never had one lock up on me. The design is so simple and yet so effective and clever. One thing you never see mentioned is how, when the gate is open, the 2 magnets repel each other and force the little locking arms open. Just perfect so they don't flop in the way preventing the gate to close. I had a 'hand tightened' Attache 3D freeze up on me. Had to use a pair of shifters to remove it. Never need to do that with my Magnetrons. One handed operation. They look stunning. I love them. Only suggestion? Make smaller versions of the RockLock.
SteveL at Mountain Gear on 05/05/2013

Great Carabiner

I got this magnetic carabiner because it was just so fascinating. It locks every time and now I want to use nothing else. The lock is amazing and is so simple. When it comes to teaching others it makes it simple where you don't have to check all the time to make sure it is locked. The lock is still very strong and I actually feel safer using it then a screw gate locking device. I actually plan on buying a few more of these because it is an amazing piece of technology. If you haven't bought one yet, you need to jump on this great device.
Jakeness019 at REI on 04/04/2013

Perfect for the right applications

The Magnetron does clipping well. The gate handles very nicely & smoothly. It is fast to clip and unclip. The Rocklock body is hardy, smooth, & proven. I like it for belaying, rappels- in general, for clipping in to a system. However, I am apprehensive about its ability to take a beating. Do not get me wrong- the Magnetron is not flimsy. But I do not anticipate the gate will be able to hold up to the kind of hard abuse a basic screwlock can withstand for years, bashing against the rock. So, for the right uses, Magnetron is great. Just pick your applications thoughtfully.
Patrick at Mountain Gear on 10/10/2013

Fun Biner

I initially bought one of these as a gag for a fellow climber (one that has climbed for 9+ years). At first glance it is a pricey piece of gear that doesn't really improve upon the original screwgate. However, we had a lot of fun using it (we sound like children). But, just pinch and go. Simple, clever and easy to use. So, while I say this is a completely unnecessary purchase, I also say that it is a unique piece of equipment and if you have the extra few dollars to spare, I definitely recommend it.
Whogirl1290 at REI on 04/04/2013

So cool.

I was on a guided outdoor climb and a few of the guys had these. I instantly had gear envy and went out and got one ASAP. This works great when you're constantly swooping climber/belayer. It takes some of the worry about forgetting to lock your 'biner away, but we still always check it. Is it worth the price? For me the cool factor said yes. You'll have to decide if having a slightly easier to operate, but infinitely cooler, 'biner is worth the added cost.
T O Double D at REI on 11/11/2013


I pretty much hate auto-lockers, but they have their uses. This one is now my go-to 'biner on my clip-in sling for long descents, for lowering clients (screwgates spin open sometimes), etc. etc. Just a super-smart product. In winter any 'biner can freeze up, but you just bash the paddles on the Magnetron and you're back in business. A screwgate or twistgate just sucks in winter, I've had to put them in my pants to warm 'em up, not so fun.
WillG at Mountain Gear on 05/05/2013

Great, easy to use carabiner

After purchasing multiple screw lock and twist lock carabiners i decided to give this one a try. I was not disappointed, its incredibly easy to open, has held up just fine on any climbs, and has yet to show signs of damage. The only possible downside to this is that since it is easy to open, there is a risk of opening it accidentally, but it has yet to happen. All in all I would definitely purchase another one
GearCollector at REI on 08/08/2013

Neutral Reviews:

I bought two of these to use canyoneering with my wife as an alternative to screw gates (which can jam up sometimes). We absolutely loved them on the first 3 trips, no problems whatsoever. They work much like an auto locking biner but for some reason are so much more fun to play with (even when not rappelling).
That having been said, on the last two trips I did, both my wife and I had issues with them jamming with sand to the point they either wouldn't open or wouldn't close. Her's especially became ridiculously jammed and even after washing it through clean-ish water vigorously and banging the crap out of it, we couldn't get it to reopen until the very end of the canyon (good thing I always have backups).
If you're not going to be using these for canyoneering or around much sand/grit, then they should work perfectly. But for me and my house, we will still have to buy screw gates.

BroRip at on 10/11/2013

Not recommended for canyoneering

I purchased this carabiner because I thought it would be simple to use and I wouldn't have to worry about my gate freezing up. I've gone through many screwgate carabiners and know the pain of having them seize up. The magnetron works great for climbing and for belay but don't get this carabiner dirty and do not bump it against anything. I've taken this carabiner through some of the best and most difficult canyons in Utah and it does not like these things. I've had it freeze up on me at least twice now. I push the sides to open it and nothing happens. I tap the gate to try and get things to loosen up and nothing. I'm not saying this is a bad carabiner because it isn't. It just wasn't designed for canyoneering. So, if that's your pleasure, then I would strongly advise against this one. Thanks.
Joel at Mountain Gear on 10/10/2013

The concept of the auto-locking mechanism using magnets is a stroke of genius. Super simple and great for one-handed operation. I used it on the end of my rescue sling during swiftwater rescue this summer . My one gripe with this carabiner is the way the mechanism is set up the slightest bit of sand and the gate won't open, not the best for rescue situations. I've also had reports of people using it when ice climbing and a similar problem occurring. Great for a belay biner but I'd discourage any situation where the biner would be on the floor making it more susceptible to having the mechanism be clogged.

Joshua Jubb at on 12/08/2013

Magnetron Carabiners

Getting use to opening for climbing in the works, however for tree climbing work I don't believe they they meet OSHA standards. Weight rating good (kn's), but need 2 opening movements, opening gate isn't counted as a movement. Just movements leading up to the gate opening.
Dean at Eastern Mountain Sports (EMS) on 02/02/2013