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DMM Ultra O Screwgate

6 reviews   |  

The DMM Ultra O Screwgate is an extremely symmetrical oval climbing carabiner, ideal for use with assisted belay devices, pulleys, swivels and shackles. 

Some oval carabiners are not as symmetrical as others, making them less useful for their designed purpose. The DMM Ultra O is one of the most oval shaped biners available and performs particularly well in a 'big wall' environment, and any other situations where the carabiner needs to allow the attachment points to be centralised and hang straight. 


  • Oval shaped locking biner for rigging stability and central positioning of attachments
  • Ideal for pulley systems and aid climbing
  • Strong and lightweight I-Beam construction
  • Keylock nose to help prevent snagging
  • Generous rope radius


  • Gate Clearance mm: 22
  • Gate Closed kN: 25
  • Gate Open kN: 7
  • Keylock: No
  • Minor Axis kN: 12
  • Width Widest mm: 66
  • Length: 109mm
  • Material: Alloy
  • Weight: 67g

Free Mura Chalk 300g

With every Rock + Run Blockbuster Chalk Bag purchased.

Customer Reviews
5.0 Based on 6 reviews
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Filter Reviews:
Pavel B.
United Kingdom United Kingdom
Great product

Solid built, very robust

Hugh T.
United Kingdom United Kingdom
Great service and product

Does what it needs to well, light, good size, ideal for ascenders and pulleys.

Brendan G.
Ireland Ireland
rounded out!

perfect for the ascender as its equal shape on each end preventing it from getting caught in the ascender as other biners get stuck and caught in the top hole. perfect combo

John A.
United Kingdom
DMM Ultra O Screwgate

An excellent aid biner at an excellent price, used with Ropeman 1 as a lightweight alternative to a Prussic

Reg F.
United Kingdom
DMM Ultra 0 carabiner

Good bit of kit; good price for a superb item..