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Cypher Firefly II Screwlock Carabiner


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  • Screwlock, One Size

Cypher made the Firefly II Screwlock Carabiner superlight for alpine climbs. Its hot forged construction keeps the Firefly strong despite its weight, and it sports a secure screwlock gate for reliable anchor setups. There's a keylock nose for snag-free convenience.
  • Hot forged construction
  • Screwlock gate
  • Keylock nose
  • Item #CYH0004

hot-forged aluminum
Gate Type
keylock nose
Major Axis Strength
22 kN
Claimed Weight
1.48 oz
Recommended Use
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 5

Can never have enough of these

I've put it through the wringer

This is the biner I use the most. Have 7 of these, plan on getting at least 7 more. Bomber for anchors and bolt friendly size means I can fit more than one on a bolt

>Rating: 5

Cheap and awesome

I've put it through the wringer

I've got a handful of these and they've been great! Smooth twist lock and quality is nice.

>Rating: 5

Pretty great for all around use

I've used it several times

This is an awesome light locker that's perfect for any utility use. I prefer to use it for making anchors and such but it can also be used for belay and such. It's quite small so I can imagine if some people wouldn't love that but it keeps it light and nice. Super easy to screw and I think it should withstand the test of time. It does come in a darker color as other reviews have mentioned.

>Rating: 5

High Quality

I picked up a few of these for some anchor work and just having some locking biners around is always useful. I was pleasantly surprised to see how smooth the screw lock and gate operate on these things. They are smaller which is perfect for keeping them around for some quick anchor work. And as the other reviews state, they are nice to look at.

>Rating: 5

Using for TR anchor

have a pair of these to use with my two draws to create locking toprope anchors. Very light and smooth. Great alternative to using a sling and biners.

>Rating: 5

Bought for kayak throw rope

Beautiful piece with very smooth screw lock. The finish and operation on this item is as good or better than that on my Black Diamonds.

>Rating: 5


I've used it several times

I bought several of these to replace some well worn black diamond lockers and couldn't be happier with them. The screw lock is smooth smooth smooth! The finish is a lot prettier than the picture if that matters to you. What really matters is that these little lockers are very well made and don't break the bank.

Agreed about the finish - dark black finish!

>Rating: 5

Small, light, and bomber!

I've put it through the wringer

I love having a bunch of little lockers around for all sorts of reasons. This thing is awesome, just as strong and as light as the leading competitors and it's gate action is super smooth - so is the screw lock!


how big is this carabiner?

Hi Martine, The Cypher Firefly II Screwlock Carabiner is 3.75in tall and 2.25in wide tapering down to 1.75in wide at the bottom. It has a 18mm gate opening. If you have any other questions or need assistance with an existing order or placing an order, please feel free to contact us on Chat or call us at 1-800-409-4502. Thanks!