Lighten up.

Mammut designed the Mytholito Screwgate Carabiner as a pared down locker for light-and-fast alpine ascents. The I-Beam construction helps cut weight without reducing strength, and the smaller size helps streamline your rack when every ounce counts.

Share your thoughts

What do you think of the

Mammut Bionic Mytholito Screwgate Carabiner

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

  • Product review:
  • Share a video
  • Share a photo

How familiar are you with the product?(Optional)

Only jpg, jpeg, png, gif or bmp files please.


Here's what others have to say...

5 5

specific gear combo

  • Familiarity: I've put it through the wringer

Just wanted to note that aside from action, weight and feel, this is one of my absolute favorite biners because it is the best for use w/ the TRE (if you can ever find one). I've found that more rounded biners don't allow the TRE belay/rappel device to fully hinge which is what makes it an auto-locking device. When placed on the lower end/small notch, the TRE works fantastic due to the increased range of motion. Comes in quite handy if you need to go hands free on rap.

5 5

Beautiful piece of gear

  • Familiarity: I've put it through the wringer

Light, solid, smooth action. I've never had the gate over-tighten. Great feel. Easily my favorite belay/screwgate biner.

5 5

True piece of good engineering

Really light and handy carabiners and they look good. they unscrew and lock easily . nothing negative i could say about this carabiner. Bought these and the HMS size and both are phenomenal.

5 5

Solid Carabiner

This biner is easy to lock/loosen, pretty light and the gate opens/closes nice and smooth after 2+ years of repeated use. Gets the job done.

5 5

Great, Light and Roomy Biner

  • Gender: Male
  • Familiarity: I've put it through the wringer

I got this biner primarily to use for my belay device. However, I've used for all sorts of things, and have learned that its light weight and spacious opening make it great for other things like bolting, rigging and multipitch climbing. It has a very high-quality feel, with smooth action in all moving parts. Plus, like the others said, it looks cool.

4 5

Belay carabiner

I use this for my belay carabiner works great.Swiss quality that says it all.

5 5

Awesome lockers.

After much research, I purchased some of these to replace my heavy, bulky Petzl Attache lockers. First off, I would be lying if I said their totally badass design didn't influence my purchase. Now, on to reviewing...

Strength-wise they are on-par with the Attaches, give or take a kilonewton. However, they are almost half the weight. The specs really don't give Mammut enough credit for how light these are. At 58g (verified), they are lighter than many of my non-locking carabiners. I love watching the stunned expressions on my friends' faces when they feel how nutty light they are.

Both the nose and carabiner body are significantly narrower than on the Attache. I found this made them easier to clip, especially when clipping anchor chains on sport routes. The gate requires more force to open than the Attaches, but is easy to hold open, and snaps shut sharply when released. It does not chafe against the nose at all, even after use and cross-loading (which is difficult to do with the carabiner shape). Operating the locking sheath remains silky smooth, even after repeated use at dusty crags.

The only downside? The gate opening is pathetically small... about 1cm less than the Attaches. However, for racking slings or pulleys, tying knots, or building anchors, it is plenty wide enough.

Responded on

Agreed, they're quite ridiculously light! I bought 5 of these from eBay last year and I wish I'd bought 5 more. The only negative I can think of is the angle of the keylock nose, together with the relatively narrow gate opening makes it slightly trickier to unclip than a 'normal' size HMS. Overall though, an excellent and versatile design.
To clear up any confusion, they were made by DMM of Llanberis, Wales, for Mammut. I have 20+ bionic pro crabs too and these are also very, very good (though expensive!)

Responded on

I took note of the comment about the gate opening: Since Attache has 20mm opening and if Mytholito is allegedly about 1cm less then this would make it about 10mm, i.e. next to impossible to use with ropes. Mammut's own site does not specify the gate opening at all.

Could other people please comment on the gate opening?