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  • Mammut - Crag HMS Locking Carabiner - Screw Gate, Leaf
  • Mammut - Crag HMS Locking Carabiner - Twist Lock Plus, Green

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  • Mammut - Crag HMS Locking Carabiner - Screw Gate, Leaf
  • Mammut - Crag HMS Locking Carabiner - Twist Lock Plus, Green

Mammut Crag HMS Locking Carabiner

$10.95 - $12.95

Free 2-Day Shipping on Orders Over $50 Order by 12/20*

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    • Screw Gate, Leaf, One Size
    • Twist Lock Plus, Green, One Size

    13 Reviews


    A robust biner.

    The Mammut Crag HMS Locking Carabiner is strong enough that you can belay and make anchors with it for many seasons. It comes with either twistlock or screw gate locking gates for your convenience, and both feature keylock noses to eliminate snagging.
    • Available in either screw gate or twistlock
    • Keylock nose
    • Item #MAM003B

    Tech Specs

    yes, twistlock or screw gate
    Gate Type
    Nose Type
    Major Axis Strength
    25 kN
    Minor Axis Strength
    10 kN
    Open Gate Strength
    6 kN
    Claimed Weight
    2.75 oz
    Recommended Use
    sport climbing, gym climbing
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Auto Lock Definitely Auto Locks

    • Familiarity: I've put it through the wringer

    I decided to check out a friend's advice and invest in an autolocking biner, which I normally don't like. I got the darker green, autolocking of this biner and while it isn't MY first choice when I'm out on the wall, if I have a friend who is less experienced with me, it makes me feel more confident when they have this biner on their PAS or belay device. It autolocks so I know they're safe. I also have the non-auto-locking and use it all the time, too. These are affordable with a sleek design and large basket so anchors stay neat and you can hold as much as you need on these biners while you're racking. A solid investment for a rack, for sure.

    Biner For All Purposes

    • Familiarity: I've put it through the wringer

    Strong, lightweight, simple, and inexpensive biner for virtually any climbing function. I love the snappy spring tension and the smooth anodized finish for belaying. One very minor gripe I have is that it takes a little longer to screw on the gate lock when compared to other HMS lockers, but if anything, it'll make sure you lock the biner all the way. Would definitely buy more of these cheap biners for anchors, belaying, etc.

    Good biner for canyoneering

    • Familiarity: I've used it several times

    Been working great out in the canyons. And, nice to have because they look different from everyone else's, so it's easy to collect gear if it's been passed around a little that day.

    What more do you need?

    • Familiarity: I've used it several times

    So, just to be clear, I got the screw lock on this specific carabiner.

    These things are great! They are a wonderful size, sitting about 4.25inches x 2.85 inches x.388 inches. I including the picture below to kind of illustrate the sizing as compared to a normal size mouse here at work!

    These things work man! I use 4 of them in a sling top anchor setup, and they have yet to show an wear and tear, much less stress or break. If you need a solid carabiner, make sure and pick these up

    What more do you need?

    Great Screw-Gate Carabiner

    • Familiarity: I've used it several times

    I got the screw-gate version to use for setting up anchors. The action of the screw-gate is really smooth, which combined with the nice anondized finish makes this a really nice feeling carabiner. It's also quite light for its size. I really like the continuous curve that this has, giving plenty of room for tying a clove hitch. It seems lighter and smoother compared to a BD RockLock, which is normally what I use. The anondized finish did wear away very quickly with rope moving through it, but that is to be expected with any carabiner like this. I also noticed that the screw gate doesn't travel quite as far with each flick of the finger as a RockLock does, meaning that it takes a little longer to open and close this one. It's very smooth, but it seems to have a little more resistance in the threads. Overall, it's a solid locking carabiner that's smoother and lighter than a BD RockLock, but not quite as easy to open and close.

    Anchors Away!

      These little beeners are just the trick! I may be more paranoid than most, but I use these as an anchoring system for my portaledge with absolutely no worry. I'll be honest, even the Rock Lock Black Diamond carabiners make me a little nervous. This Mammut Crag just feels like a much more solid design. If you need to anchor, these are the ones to snag.

      Mammut Crag HMS Locking Carabiner

        This is a good carabiner for your anchor. I use it in professional Arborism. Anchor it to a sling & rope. Use a figure 8 knot on the rope. It can NOT accidentally unlock! Screw-lock carabiners can untwist, if not screwed tight, or in one's haste forgets to tighten the carabiner completely. You do need 2 hands though, unless you have excellent dexterity to open & close it with one.

        Returned the twist-lock

        • Familiarity: I've used it once or twice and have initial impressions

        Good size and nice feel, but hard to operate. You have to push the sleeve up before you can twist it to open the gate, which make it hard to use with one hand. Dirt also got stuck in the sleeve pretty quick. Returned it after use to get some screw gates of the same carabiner instead.

        Is this a standard twist, then open or do...

        Is this a standard twist, then open or do you first have to slide the sleeve up, then twist then open?