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DMM Ultra O Durolock Carabiner

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DMM Ultra O Durolock Carabiner
Item #: 39505
Tensile strength 5,620 lbs (25kN), aluminum, triple-locking, 11/16in gate opening, high precision gate timing, weighs 4.8oz.

Availability: In Stock


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The Durolock is a patented 4-way locking gate mechanism designed to minimize the chances of accidental gate opening and maximize security. The gate is sophisticated yet functional operable with one hand.

The oval shape of the Ultra O facilitates multiple connections, the round basket shape allows any of the connections to self-center when weighted. The symmetrical baskets mean rotation within systems is not required as they sit comfortably either way round.

The Ultra O Durolock is the ideal connector to give you peace of mind in complex situations.

  • Unique twin barrel construction provides 4-stage unlocking action.
  • Design gives extra security when used in close proximity with moving ropes.
Additional Information

Additional Information

Weight 0.23 lb.
Final Sale Item No
Brand DMM
Certifications or Standards Yes
Gate Opening 11/16 in (17.5 mm)
Material Aluminum
Tensile Strength 5,620 lbs (25kN)
Working Load Limit 562 lbs ( 2.49 kN )
UPC Code 5031290209854

Customer Reviews

Added Redundancy for life support. Review by Will
I like the idea of adding a 4th lock to the carabiner action and DMM as usual does a great job with quality and usability. I use this on my lanyard's hitch side as it's and area that I may not double check as often and can get roughed up climbing, with this and a tri action snap I feel all fuzzy inside when I clip my strap. With a bit of practice the action isn't too difficult and can still be opened with one hand. (Posted on 9/6/2018)
Triple-Locking makes sense. Review by theXman
they should put triple-locking in the main title of this biner. I've been looking for it. Cool, ordering 4 of them. A friend has some. After a 2 way dmm has opened up on me, I felt I got my warning and it would be stupid to ignore my warning. (Posted on 12/7/2016)