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Black Diamond
RockLock Screwgate Carabiner

4.836363636363636 out of 5 stars
55 Reviews



RockLock Screwgate Carabiner

The RockLock Screwgate Carabiner is Black Diamond's biggest biner for belaying, top rope anchors, and long-lasting durability in the climbing world. Black Diamond designed this locker with a keylock nose for snag-free unclipping, a curved spine for a larger gate opening, and a square hinge to hold your belay device in place.


  • Black Diamond's largest screwgate locking carabiner ideal for belays
  • Keylock nose eliminates snagging while unclipping
  • Screwgate lock is simple and secure
  • Item #BLDZ972
hot forged aluminum
Gate Type
keylock nose
Major Axis Strength
Minor Axis Strength
Open Gate Strength
Gate Opening
Claimed Weight
Manufacturer Warranty
1 year

Overall Rating

5 based on 55 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 7 reviews
5 Stars - 47 reviews

What do you think about this product?


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5 out of 5 stars

February 11, 2024

Paired with my belay device…nice

Nice beefy biner for use with my belay device and it works great. Only wish I have is a different color under the locking portion that is revealed when the biner is unlocked. It would just be another visual indicator that everything is good to go. No complaints with the actual device though!

Cord R.

Originally reviewed on

5 out of 5 stars

February 3, 2024

super carabiner!

Without a doubt a classic! I love the versatility of this carabiner, its robustness and resistance.

Emilia 4.

Originally reviewed on

5 out of 5 stars

February 1, 2024


Nice and beefy locking carabiner. I like that it is large, but still lightweight compared to my older locking carabiners.

Christopher F.

Originally reviewed on

5 out of 5 stars

January 28, 2024


Love these. I put confidence that these will do a great job belaying.

Kien V.

Originally reviewed on

5 out of 5 stars

December 18, 2023

Solid carabiner

Beginner to the sport and the quality feels amazing.

Jun L.

Originally reviewed on

5 out of 5 stars

December 5, 2023

Best carabiner

Just to say, that I moved from Europe (French speaker) last November and usually, I use the Petzl gears, but this carabiner from Black Diamond is the best, very effective for setting up the ropes, easy to clip and lock the carabiner. As instructor for scouts, I confirm that this carabiner is the best quality

Bruno C.

Originally reviewed on

5 out of 5 stars

November 28, 2023

Simple, functional

Perfect, exactly what should be expected from a Carabiner. Nothing fancy and works great. Thickness is perfect for ATC devices and creates enough friction for good belaying. Price point is about right, nothing bad to say!

Jonah S.

Originally reviewed on

5 out of 5 stars

November 17, 2023

I have a lot of these

I have so many of these, they have become my go to screw gate carabiner! I use them for my anchors, jugging rig and more!

Ashley G.

Originally reviewed on

5 out of 5 stars

October 9, 2023

Great workhorse biner for toprope anchors

I been using these for years on sport anchors. A pair usually last a season of heavy use.

John D.

Originally reviewed on

5 out of 5 stars

September 6, 2023

They look and feel sleek

They will live in my ZDrag kit and I hope they go on looking sleek without ever needing to be tested out!

Daniel K.

Originally reviewed on