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DMM Ultra-D Screwgate



The Ultra D is similar in size and weight to the Ultra O; however it is stronger and has a slightly bigger gate opening.

The open D shape gives a lot of internal space within the biner, which makes it useful for setting up belays. It’s also finding favour as a perfect partner to a belay device.


  • D shaped locking biner

  • Strong and lightweight I-Beam construction

  • Shrouded nose

  • Generous rope radius

  • Can be supplied with a captive pin to hold the biner in a specific position and prevent cross-loading