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Black Diamond
Gridlock Screwgate

In Stock  Product Number: 25677

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The Gridlock Screwgate by Black Diamond is a belay-specific carabiner. With its revolutionary, patent-pending design made possible by Black Diamond's in-house hot forge, the Black Diamond GridLock Screwgate eliminates the dangers of cross loading. Designed specifically for belaying, the intuitive, easy-to-use GridLock isolates the belay loop behind its uniquely shaped gate, thereby keeping the carabiner in its proper orientation. The GridLock's I-beam spine transitions into a large, rounded rope-bearing surface for maximum strength and smooth rope feeding. Simply put, you'll never have to deal with a shifting, cross-loaded belay carabiner again.

* This product does not qualify for shipping to all countries.


  • Hot-forged construction
  • Patent-pending design eliminates cross loading while belaying
  • I-beam spine transitions into a rounded, large rope-bearing surface
  • Intuitive and easy-to-use design
  • Screwgate sleeve
  • Closed Gate Strength : 22 kN (4.946 lb/f)
  • Open Gate Strength : 8 kN (1,798 lb/f)
  • Minor Axis Strength : 7 kN (1,574 lb/f)
  • Gate Opening : 21 mm (.83 in)

  • For safety and/or sanitary reasons, this product CANNOT be returned

Gender: Unisex
Weight: 76 g (2.7 oz)
Season: F13
Vendor ProductId: 210257
Review ProductId: 25677


by PowerReviews
Black DiamondGridlock Screwgate

(based on 7 reviews)

Ratings Distribution

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  • 1 Stars



Reviewed by 7 customers

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Displaying reviews 1-7

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A Simple, Elegant Solution

By Josh

from Canada

Comments about Black Diamond Gridlock Screwgate:

Love love love this carabiner. It fits well in the hand, is simple to use, while giving peace of mind that the biner will stay where it should, when it should. I would like it if BD make a larger version as well for other uses than belay.


So thankful manufacturers are finally addressing crossloading

By joel

from Anacortes, WA

Comments about Black Diamond Gridlock Screwgate:

I look at normal carabiners as the weak link in the climbing chain because of the possibility of cross loading. At one point I even went so far as to use a steel biner with a 53kn rating until I found out it had the same 7kn cross loaded strength. Then I started wrapping surveyor tape around the biner and belay loop to keep it oriented properly, etc. THANK YOU MANUFACTURERS FOR FINALLY ADDRESSING CROSSLOADING! Do I think the gridlock is perfect? Not yet, but I also don't have any opinion on how to improve the design to perfection. The little tail can get caught on stuff and make the gate difficult to open or close. Also, it is very important that you check the location of the belay loop when you lock the gate just to make sure it is in the small eyelet portion of the biner before belaying, EVERY TIME. It is possible that the gate tail could lever the belay loop into the main carabiner opening creating a guaranteed crossload scenario. A super easy check but worth doing every time with this biner (see video.) Don't take this above criticism as a reason not to purchase the gridlock. I will be buying more here soon as I think they are great! You can check belay loop location, you can't check crossloading. I actually don't want anyone belaying me without one. Check this youtube link for a short video I made describing this.

(3 of 4 customers found this review helpful)


One less thing to think about

By Steve

from Vermont, USA

Comments about Black Diamond Gridlock Screwgate:

I purchased the gridlock when it first came on the scene. It's a pretty genius little biner. I have never been terribly worried about cross loading a biner, but I always use the Gridlock now. One less thing to worry about, more time to focus on climbing.


Great for its intended purpose.

By Daniel

from Astoria, OR

Comments about Black Diamond Gridlock Screwgate:

I like this biner. My wife likes this biner. The gridlock does what it is designed to do and I'll leave it at that. There are certainly times that I chose a more traditional biner (like the RockLock). My wife likes her gridlock to much (particularly for multi-pitch or complicated anchor set ups because it gives her a warm-fuzzy that she's not going to side-load anyting). She's making me order two more for back ups in case we ever damage one. We use this in combination with our BD Mini Pearabiner and ATC Guide EVERY time we climb/multi-pitch.


Never leaves my harness

By Greg

from Grindelwald, Switzerland

Comments about Black Diamond Gridlock Screwgate:

Whether ice or rock climbing, mountaineering, ski touring, the Gridlock never leaves my harness. Sure there are other biners designed to prevent cross loading, but for the first time, I own one of those biners that actually works. Next gen improvement: please increase the depth of the knurling on the gate (for those like me who use the Gridlock with gloves). Overall: It works in real life mountaineering, and simply for that reason, it's excellent. slickness and beautifull design are just bonuses.

(2 of 2 customers found this review helpful)


Everyone needs one

By Doug

from Bozeman, MT, USA

Comments about Black Diamond Gridlock Screwgate:

Finally, a carabiner for my belay loop that won't crossload or twist. Why did it take so long? It's worth having a dedicated biner for belaying and rappeling. It's important and worth keeping it on your harness for cragging.



By I run for fun

from Chattanooga, tn

Verified Reviewer


  • Sport Climbing


  • Not versitile
  • One use

Best Uses

  • Sport Climbing

Comments about Black Diamond Gridlock Screwgate:

This carabiner is not what I expected. It felt like it just took space on my harness. It has no other function than to belay therefore it is not very versitile. In my opinion just stick with a normal screwlocking carabiner. I took it off my harness.

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