How to choose a carabiner

-Locking System

Locking carabiners can have either manual locking or auto-locking systems. Manual systems (SCREW-LOCK) require the user to screw the sleeve on the gate to lock it.
They are great for carabiners that are opened and closed only occasionally, like the central carabiner at a belay station. Manual systems are recommended for use in gritty environments, where dust and dirt could cause auto-locking mechanisms to malfunction.

With auto-locking systems (BALL-LOCK, TRIACT-LOCK, TWIST-LOCK) the gate locks automatically, an advantage for carabiners that are opened and closed frequently, like the carabiner that connects a belay/rappel device to a harness.
 

SCREW-LOCKSCREW-LOCK
Manual screw gate locking system

  • The red band provides a visual warning when the carabiner is unlocked
  • Excels in gritty environments, where other systems may jam
  • Available on the Am’D, WILLIAM, ATTACHE, ATTACHE 3D, LOCKER, OMNI and OK models

     

 

 

 

BALL-LOCKBALL-LOCK
Auto-locking system with lock indicator

  • The green button indicates when the gate is locked
  • Resists accidental opening when locked
  • Easily opened with one hand
  • Available on Am’D and WILLIAM models

 

 

 

 

TRIACT-LOCKTRIACT-LOCK
Auto-locking system

  • Easy to use, even when wearing gloves.
  • Resists accidental opening when locked.
  • Available on the Am’D, WILLIAM, OMNI and OK models.

 

 

 

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-Carabiner shapes

Petzl carabiners come in three main shapes, each one is designed for a specific purpose:

Asymmetrical shape:
For connecting belay/rappel devices or for use at the end of a lanyard.
Asymetrical

Pear-shaped:
Best for anchoring several ropes, slings or other devices and for use with the Munter hitch.
Pear shaped

Symmetric shape:
To attach belay devices, pulleys, or other equipment. The form helps to prevent shifting when loaded
Symetric