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GridLock Magnetron Carabiner

Item# BD2102920000ALL1
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Overview READ MORE
Our innovative belay biner featuring Magnetron Technology, which uses magnets in the gate and a steel insert in the nose for unprecedented security and ease of use.


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Cannot be used with oversized items or skis

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Combining 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.

  • Hot-forged construction
  • Innovative gate design uses two magnetic arms in the gate and a steel insert in the nose for super-secure, interference-free closure
  • Keylock nose prevents snagging
  • One-hand operable
  • Unique shape isolates belay loop to eliminate cross-loading
  • I-Beam spine transitions into a rounded, large rope-bearing surface
  • Type H or HMS connector. For dynamic belaying using a Munter Hitch or belay device.

Tech Specs

Tech Specs

Weight :   78 g (3 oz)
Closed Gate Strength :   22 kN (4,946 lbf)
Open Gate Strength :   8 kN (1,798 lbf)
Minor Axis Strength :   7 kN (1,574 lbf)
Gate Opening :   21 mm (0.83 in)




GridLock Magnetron Carabiner is rated 4.6 out of 5 by 11.
Rated 5 out of 5 by from Fast and safe. At first, it was unusual for me to use the Gridlock Magnetron. You get used to it over time. It’s well built and the magnetic catch makes the carabiner a lot easy to open than automatic screwgate ones. I really liked the Gridlock Magnetron. That also makes it safer as I do not need to worry that the gate is not closed properly.
Date published: 2020-03-30
Rated 5 out of 5 by from Fast and safe, just takes a little getting used to I love the Magnetron Gridlock. It’s well built and the magnetic catch makes the carabiner a lot easy to open than automatic screwgate ones. That also makes it safer as I do not need to worry that the gate is not closed properly. The feature that prevents cross loading needs a little time and practice to get used to but I prefer Black Diamond’s design rather than others which has an additional spring, which also means one extra step and component that might fail. One other reviewer mentioned that the clearance is too little for his pilot ATC and blamed it for wearing out his belay loop. I can only say yes the clearance makes it a bad design, but it’s the bottom loop that is used with the belay loop, not the top?
Date published: 2019-08-22
Rated 5 out of 5 by from It’s secure for sure I like the simplicity of the magnet lock, I also like how heavy and loud the closing sound it. It just.. sounds secure and it looks really secure. Taken and held quite a few falls already and it’s all good here. I’m most happy with it’s fool proof design though. You can’t really mess up closing it, nor can any bump or accident make it open. You gotta try to open and close it and that’s what matters ya know? Especially when in the hands of a younger one who is easily distracted.. had a screw lock failure one too many times.
Date published: 2019-07-08
Rated 2 out of 5 by from It depends on the belay device The carabiner itself is well made and the Magnetron system is easy to use. In combination with the ATC Pilot, the Gridlock is terrible to use: - The clearance between the carabiner and the ATC Pilot is so minimal, you need to position them precisely within a few millimeters (see picture). It is not just about 'clipping in', it is about 'surgical precision' to get you Pilot, belay loop and Gridlock paired. So... a real struggle every time you're clipping in and in the end it is frustrating. - Due to the minimal clearance, the belay loop wears faster. When comparing my harness with my girlfriends (we both got it at the same time, did roughly the same amount of climbs and both use the Gridlock Magnetron (but different belay devices)), my belay loop is more fluffy compared to hers (see pictures). Not ideal. In the end, I see the potential of the Magnetron system but I would not buy it again nor recommend this product to a friend. When taking the price and handling into account, for me it's not worth it. Of course it depends on the belay device you will be using, but choosing a slightly larger carabiner/different shaped carabiner, might save you a lot of frustrations (and money).
Date published: 2019-03-11
Rated 5 out of 5 by from Perfectly Specialized! I don't own many of the Gridlock Magnetron Carabiners, but the ones that I have get used often as critical links in the chain. For example, when clipping a client into the middle of the rope for glacier travel, or clipping a client into a cows tail when short roping. Knowing that the carabiner stays in the correct orientation and is unlikely to be cross loaded certainly give peace of mind and lets me focus on other tasks.
Date published: 2019-01-05
Rated 5 out of 5 by from Cool belay carabiner Have had it about a month. The magnetic locking gate works flawlessly
Date published: 2018-03-24
Rated 5 out of 5 by from My Favorite Triple Action Locker I don't use this carabiner for belaying. It's strong in that role, though I find the belay loop capture fiddly when moving between climbs. For my use, the GridLock/Magnetron design really shines when connecting a climber to the middle of the rope with a cowtail--a maneuver that normally requires two lockers opposite and opposed to minimize the possibility of cross loading. A single triple-action, captured-loop carabiner can safely achieve the same effect, and the GridLock Magnetron enables this with a minimum of fuss. It's a dedicated piece on my instructor rack that provides a quick, professional solution and doesn't look MacGyvered.
Date published: 2017-10-28
Rated 5 out of 5 by from Top product ! I really love belaying someone with the GridLock Magnetron. Try it out and you will never go back !
Date published: 2017-09-10
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