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Black Diamond
Rocklock Twistlock Carabiner

In Stock  Product Number: 4340

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The Black Diamond Rocklock Twistlock carabiner is one of Black Diamond's largest locking biners. The new Keylock has a non-snagging keylock nose. A slightly curved spine maximizes the gate opening and a square hinge end holds your belay loop securely in place. The Rocklock's large size makes it an excellent choice when using two ropes, wearing gloves, or when using a variety of belaying and rapelling techniques. Its large capacity can handle multiple clove hitches at belays. The Rocklock Caribiner is easily operated with one hand.

* This product does not qualify for shipping to all countries.


  • Non-snagging keylock nose
  • Large capacity
  • Easily operated with one hand

  • For safety and/or sanitary reasons, this product CANNOT be returned

Gender: Unisex
Weight: 89g, 3.1oz
Material: Aluminum
Season: F14 S15
Vendor ProductId: 210252
Review ProductId: 4340


by PowerReviews
Black DiamondRocklock Twistlock Carabiner

(based on 2 reviews)

Ratings Distribution

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  • 1 Stars



Reviewed by 2 customers

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Great for newbie

By Sam

from New haven, ct

About Me Getting Started

Verified Buyer


  • Quick to open


    Best Uses

    • Indoor climbing

    Comments about Black Diamond Rocklock Twistlock Carabiner:

    This has saved me from making a mistake when distracted while belaying

    • Was this a gift?:
    • No

    Great Belay Biner

    By Wayward Son

    from Somewherein, KS

    About Me Avid Climber

    Staff Reviewer


    • Durable
    • inexpensive
    • One hand operation
    • Quick to open
    • Simple


      Best Uses

      • Sport climbing
      • Trad Climbing

      Comments about Black Diamond Rocklock Twistlock Carabiner:

      Great carabiner for belaying.....
      Easy, one-hand operation--
      Oversized for ease of use and safety--
      Doesn't get in to a cross-loaded position during belaying--
      Highly recommended--

      • Was this a gift?:
      • No

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