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Thank you for a great year! PLEASE NOTE - We will be shut down from Dec 23 to Jan 10 - 2022. We will not be checking emails and last orders will be shipped the 22nd of Dec. Any orders received over the shutdown period will be picked and shipped over the week of the 10th. Merry Christmas!

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