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DMM Boa 30kN Locksafe HMS


The DMM Boa Locksafe 30kN HMS is a large and very strong offset HMS carabiner with a massive gate opening, perfect for thick ropes, multiple knots or slings.

An offset shape gives the DMM Boa Locksafe HMS a lot of extra strength without compromising it's core function as a HMS, allowing it to not only handle standard HMS duties well - belaying Italian hitches - but providing a lot of extra capacity and safety when it comes to rigging.

Locksafe Mechanism
This clever, triple-action locking mechanism is almost as simple to use as the original spring-loaded 'Kwiklock' mechanisms, requiring just one extra push-up action of the barrel before the twist. This extra dynamic (level of safety) means the biner provides far better protection against accidental opening.


  • Big and beefy
  • Clean nose HMS belay carabiner
  • Large gate opening
  • Great for rigging and belay situations: can accommodate several knots


  • Gate Clearance mm: 24
  • Gate Closed kN: 30
  • Gate Open kN: 8
  • Keylock: Yes
  • Minor Axis kN: 10
  • Width Widest mm: 82
  • Length mm: 120
  • Material: Alloy
  • Weight: 87g