Black Diamonds largest belay and rappel locker.


In Stock - 6 Available

Local Pickup- Hobart - $0.00
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The Rocklock is the ideal workhorse carabiner for everything. From belaying at the gym to buliding trad anchors, this is the biner for the job. The Black Diamond Rocklock twistlock's all round versaility is due to several thoughtful design characteristics. It is Black Diamond's largest Carabiner, yet its shape allows easy use with one hand and the curved spine maximizes the gate opening range, whilst the squared bottom end holds a belay loop or anchor point securely in place to prevent reduce rist of cross loading. The keylock nose increases strength and prevents snagging. It's light enough to compete with the more expensive models but its affordabilty makes it one of our top sellers. The twistlock version is self locking but still extremely easy to open with one hand.

Black Diamonds largest belay and rappel locker, the Black Diamond RockLock carabiner features a keylock, is Munter Hitch compatible and can be operated with one hand.


  • Square hinge end holds belay loop securely in place
  • Slightly curved spine maximizes gate opening
  • Keylock nose prevents snagging
  • One-hand operable
  • Twistlock sleeve


We use two different forging methods to build carabiners—hot and cold forging. Each has its benefits and using both allows us to achieve the best possible shape, size and strength for each carabiner’s intended use. HOT FORGING, a process where both the rod stock and forge dies are heated, allows us to “move” the metal, creating more intricate shapes, such as our GridLock and Oz biners.


Weight :  89 g (3.1 oz)
Closed Gate Strength :  24 kN (5395 lbf)
Open Gate Strength :  7 kN (1574 lbf)
Minor Axis Strength :  7 kN (1574 lbf)
Gate Opening :  21 mm (0.83 in)


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