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  • Black Diamond - Rocklock Carabiner - Mocha

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  • Black Diamond - Rocklock Carabiner - Mocha

Black Diamond Rocklock Carabiner

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    • Mocha, Twistlock
      sale $13.26

    146 Reviews


    Give yourself space to lock into your belay station with the Rocklock.

    The Black Diamond Rocklock Twistlock carabiner is one of Black Diamond's largest locking biners. The new Keylock has a non-snagging keylock nose. A slightly curved spine maximizes the gate opening and a square hinge end holds your belay loop securely in place. The Rocklock's large size makes it an excellent choice when using two ropes, wearing gloves, or when using a variety of belaying and repelling techniques. Its large capacity can handle multiple clove hitches at belays. It's easily operated with one hand. –Vendor
    • Item #BLD0731

    Tech Specs

    Gate Type
    Major Axis Strength
    24 kN
    Minor Axis Strength
    7 kN
    Open Gate Strength
    8 kN
    Claimed Weight
    89 g
    Recommended Use
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Perfect Belay 'Biner

    • Familiarity: I've put it through the wringer

    I love this 'biner for belaying and for setting up the rope in the chains on top of a sport route. Its thick, rounded perfectly for rope flow, and its light. I've never had the threads jam on the gate lock. I wish I had a dozen of these.

    Awesome belay biner

    • Familiarity: I've put it through the wringer

    Sure, you could get something lighter/smaller for your big days in the backcountry, but it's really hard to beat this biner for everyday use and comfort when belaying. Incredible value that will take you a long way.

    Great biner for belay

    • Familiarity: I've used it several times

    This is the first locking biner I bought for belaying and it works just as described. And just as I'd hoped. Really wide end for rope and ATC, easy to get everything into the gate, and it locks/unlocks with some smooth twists. No complaints or issues so far.

    Boom proof

    • Familiarity: I've put it through the wringer

    This is now my go to biner. I have all types of biners from megatons to auto locks. This biner is easy to use with one hand and does not take a lot of screwing to tighten it completely. It is nice and beefy, smooth in design. Your rope flows smoothly around this binder. And when you brake there is a nice bite on the rope that will give you that extra stopping power you need to belay your partner. This is great produce that BD makes, and should never change the design.

    There's a reason everybody has one.

    • Familiarity: I've used it several times

    Next time you're at the crag, take a look around at what everybody has holding their belay device onto their harness. Odds are over half of them are this Rocklocks. A great carabiner for a great price.

    Perfect Biner

    • Familiarity: I've put it through the wringer

    These are a staple. Bomber locker that holds up to the abuse. I just came back from a climbing trip in Moab and saw some competitor equivalents in action. There's no competition - these take the cake.

    Bomber locking carabiner

    • Familiarity: I've put it through the wringer

    Nice large locker that works great for everything from anchors to Munters. The weight is acceptable considering the size of the biner, and you won't find better for the price. I always have a few of these in my pack for the emergency top rope set up if I'm out with a few new climbers.


    • Familiarity: I've put it through the wringer

    I love these. I use 1 or 2 in every anchor I build. They have a smooth action, don't snag, and aren't too heavy. On top of that, I've use a couple of them for top rope anchors on multiple occasions and they show little sign of wear. Great product that holds up well.

    Screwgate or Twistlock?

    Screwgate or Twistlock?

    Twistlock and these kinds of auto-locking gates are mainly (IMHO) for eliminating the possibility of forgetting to lock the biner on belay.

    They are good when sport-climbing with inexperienced climbers that might not have the muscle memory to screw down the gate without thinking.

    In almost any other situation I find the simplicity and familiarity of the good-old screwgate to be faster and less hassle than any other fancy option.

    Personally I prefer the Twistlock. My Rocklock Twistlock has been attached to my Reverso for the past 4 years as my exclusive belay and rappel biner on rock, ice, and alpine routes. At this point, I can blindly grab it and open it with either hand and throw it on my belay loop (or elsewhere). The Twistlock means that I don't give a second thought to ensuring it is locked. I can't remember a single moment of fumbling. I even used it in AK with heavy gloves.

    In most other cases, I do prefer the standard screwgate (building an anchor, for example). For belay and rappel, though, I appreciate the fact that it locks immediately upon closing.

    Note that the Twistlock is a twist-only mechanism, as opposed to some others which are lift and twist. For me, lift and twist is extremely difficult to do one-handed, leading to a lot of fumbling moments.

    There is no such thing as one locker for all purposes. A complete rack will have a variety of different kinds. For me, this is exclusively a belay and rappel biner. I suppose I could see it being used to create a master point, too. Beyond that, though, you should be looking elsewhere. For general purpose (anchor building, locking draws, etc.), I recommend the Mammut Element twistlock. For top-rope anchors, the Petzl Am'D twistlock is hard to beat (or better yet, get some steel lockers that you'll never have to replace).

    Gatorland Orlando Fl. has a new zipline,...

    Gatorland Orlando Fl. has a new zipline, We are using BD rocklock, what is the best way/product to keep gate moving freely.

    Anybody know if this will fit on the Petzl...

    Anybody know if this will fit on the Petzl Pirana? I've heard that is only fits the Petzl William or Attache but I already have this biner and don't want to buy another one..