Mammut Moses Carabiner


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Weighing in at just 27 grams, one of the lightest carabiners on the market. The Moses is the ideal companion for mountaineering or whenever weight matters. Wiregate resists icing over.


  • Breaking load lengthwise: 23 kN
  • Breaking load across: 9 kN
  • Breaking load open: 8 kN
  • One of the lightest carabiners on the market
  • Wiregate resists icing over
  • Weight: 27 g.

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Review Summary

5 out of 5

8 Reviews

8 Ratings & Reviews

TypeOfClimbing: Alpine / 5
from Berkeley
25-34 yrs

Best small biner
January 22, 2011

In my opinion these are the best small biner out there. I use exclusively this biner on my rack, except if I want to color-code biners to match cams. They are just so light, they are narrow so you can fit a bunch on your harness, and the gate action is superb. I never feel any issues whatsoever clipping the rope. What's not to like?

Follow moses to the promised land...
July 23, 2010

These biners strike a good comprimise between weight, gate opening, and cost. I use them exclusively for alpine or 'yosemite' extendible trad draws. The Camp Nano 23s compare on price and are lighter but I prefer the feel and clip-ibility of the moses.


from Los Angeles, CA
25-34 yrs

Amazingly light!
September 13, 2011

I am not a climber so I cannot speak to the climbing performance of this biner, but I am an avid backpacker who appreciates lightweight gear. I typically carry 2 biners with me when backpacking, and recently came across these which are nearly 1 oz lighter each. They are amazingly light and boast the same kN ratings in both directions as the ones I was previously using. They are stamped as Made In Italy, and have a very slender profile. They are slightly smaller than the ones I was previously using, but by all means still a full sized carabiner.

Best biner ever?
January 06, 2010

This is certainly the best lightweight biner, maybe the best biner I've ever used. It's lighter than, or just about as light as, any other, but it's still almost as big as a normal biner. This makes its handling much improved over the micro biners. They even look really high quality! I'm slowly converting all my non-lockers to these.

Truly Lightweight
January 17, 2009

Overall a great biner. Truly lightweight - the lightest in my pack. It is a bit small, smaller than the Black Diamond standard D, for example, but just as strong and noticeably lighter. Holding 4 BD standard D's in one hand and 4 Mammut Moses wiregates in the other is astounding. If you're racking up with 5-10 biners, no problem, but anything more and the weight difference would be phenomenal.


July 04, 2011

nice small carabiner to use for anything and everything. most often i use this to clip my shoes to my bag or harness. i got a bunch and am always finding different uses for it.

Great Biner!
November 13, 2009

I recently bought a bunch of these biners to replace the biners on my trad draws. I ended up shaving about 2 pounds off my rack (15 draws) with these biners. They're among the lightest biners available, just a touch heavier than the Nano 23's, but the Moses biner is larger and much easier to clip. The only thing I didn't like was that they are only available in one color. Nothing a little gear marking tape can't solve though. Overall though, this is a fantastic lightweight biner that takes up minimal space on my gear loops.

Best lightweight biner
March 13, 2009

I have tried three two four small light weight biners and these are the best. The low weight is awesome, but what is really nice is the thickness. They are significantly thinner than other biners. I can rack all 10 of my draws/slings on a single harness gear loop. The gate action is incredibly smooth and very easy to clip if you have medium to small hands. I actually find it easier than full sized biners. However, if you are looking for a full sized light weight biner, then try the WC heliums.

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