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DMM Ultra O Carabiner

The perfect locker for use with pulley systems, swivels or shackles. The Ultra O is a symmetrical locking carabiner that allows the equipment attached to it to sit centrally at both ends of the carabiner – this means that the Ultra O has very stable loading characteristics because attachments will naturally self-centre under load with minimal movement of the biner. This characteristic makes it ideal for use with assisted braking devices, pulleys, swivels and shackles. It is also desirable for rigging where it is imperative that anchors are not shock loaded.

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Keylock eliminates snagging

This carabiner’s nose slots into a groove in the gate, allowing it to achieve full strength without a gate notch. This creates a clean internal profile that won’t catch on gear, bolts or slings, giving easier clipping and removal from systems.

Oval carabiner for rigging stability and central positioning attachments

Oval carabiners have curved rope baskets for compatibility with slings, ropes, pulleys, and devices. The baskets allow attachments to self-centre when loaded, giving greater stability in systems that D shaped carabiners. Their symmetry allows them to work both ways in rigging systems.

I-Beam construction for optimum strength to weight ratio

I-Beam construction techniques allow carabiners to be lighter without compromising strength. This is achieved through hot forging, a process which allows metal to be made into complex shapes that improve functionality.


  • MBS (Major Axis): 25 kN
  • MBS (Minor Axis) 12 KN
  • MBS (Gate Open): 7 kN
  • Gate Opening: 21 mm
  • Dimensions: 63 x 109mm
  • Weight:
    • Screwgate: 67g
    • Kwiklock: 74g
    • Locksafe:
  • Colours: Matt Grey, Black


  • EN 362:2004 B/ T
  • EN 12275:2013 B

Additional information

Locking Mechanism

Kwiklock, Locksafe, Screwgate


Titanium / Green, Matte Grey