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Strongest is strongest.

With an impressive 30kN strength rating, DMM's Big BOA Locking Carabiner might just be the strongest locker on the market for climbing and rigging rescue scenarios. Despite its high strength, the Big Boa has an I-beam construction to keep it surprisingly light. Its opening is so large that the Big Boa can accommodate up to three clove hitches, and DMM made this carabiner available with a standard screwgate, a twisted screwgate, or a triple-locked duralock gate.

  • Strong I-beam construction
  • Large gate opening
  • Available with screwgate, twisted screwgate, or duralock gates
  • Reviews
  • Q & A

Great as a belay biner

  • Familiarity: I've put it through the wringer

The large gate opening and smooth locking action make this a great choice to hook up your atc with.