Mammut Crag Smart HMS Locking Carabiner

Cross-loaders rejoice.

Mammut equipped the Crag Smart HMS Locking Carabiner with a safety gate to prevent cross-loading while belaying. This safety gate also reinforces the twistlock's closure, making it safer than standard locking carabiners. Mammut designed it to pair with the Smart belay device, but it'll make any belay device easier to handle.

  • Twistlock gate
  • Safety gate
  • Reviews
  • Q & A

Not bad

  • Familiarity: I've put it through the wringer

I got this to prevent cross-loading while belaying. It's light, strong, and did a decent job preventing cross loading. However. I was using it with an ATC-guide (didn't read instructions carefully, haha). Anyway, the bad thing is it wore out in about 8 months of 1-2x a week use. The rope just ran huge grooves into it and I didn't get the lifespan out of it I was hoping for. Of course, it's on me for using it with an ATC.

Perfect for what it's meant for

  • Familiarity: I've put it through the wringer

Not to dis crypple's review, because he's right that it's not the right locker for use with an ATC, but Mammut makes it pretty clear that this 'biner is designed for use specifically with the Alpine Smart. If' you don't intend to use it with that, don't buy it. But I use the Alpine Smart (AS), and am a HUGE fan of it over any other ATC design or self-locking belay device, and this is the right 'biner to have with it. The AS does have a dangerous tendency to rotate down the spine of other locking 'biners you might use on your belay loop, causing jams and hindering the brake assist, which is annoying and scary. But the Crag Smart greatly lessens the likelihood of that (though it can still happen partly if you aren't diligent) and keeps the system smooth and safe.