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R.T.
August 11, 2025
The Ultra 'O' is a true oval carabiner, rated at 25 Kn (5,260 lbs.) in the closed and locked position. It is outstanding in quality and function. I use it for textiles, pulleys, and mechanical ascender/descender devices. It has an 'I-beam' cross sectional profile, which makes it suitable for a variety of devices that specify a carabiner with an I-beam cross section.
TheWildMan
August 7, 2025
It has all the quality you would expect from DMM. The gate opens well and this carabiner fits the Pinto Pully (many carabiners are too small) very well. The first time I was able to use it was actually working on a 10/12 roof as part of a Horizontal Life Line, but it will get put into my standard tree climbing setup once I am done with that project.
Geoff Rhodes
August 4, 2025
Very nice oval carabiner. Triple locking action.
Brian
June 21, 2025
Had these before nice biners
AquaNut
June 5, 2025
Overall, I really like the smooth feel of the body and action on this carabiner. It took some practice before I could open them with one hand, but they easy to work with. Shortly after I got them, I had one fail to close automatically. It was not stuck on a burr and the spring felt normal. It snapped shut when I barely touched it, but I was able to reproduce it one time (after a considerable amount of fiddling). It worked flawlessly after that.
niklovin
April 15, 2025
very nice
James E.
April 10, 2025
Nice carabiner ,smooth action.
Robert Fejes
March 28, 2025
Super light oval 'biner.
vigroovian
February 21, 2025
Great Carabiner - I’m using it as part of my kit for work. Super reliable and versatile.
Gazanaz
February 13, 2025
All DMM kit is the best you can get.
Dariusz Skrzypczyk
February 10, 2025
Very good carabiner
Chris Boardman
January 3, 2025
Maybe I am doing something wrong, but I can't easily operate this Krab one handed
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