DESIGNED FOR LANYARDS: Optimized for use at the end of JOKO or PROGRESS lanyards for adventure parks and work-at-height progression. TWIST-LOCK SYSTEM: Features an automatic double-action locking system that is easy to open (turn and pull) and auto-locks when released, ensuring security. ERGONOMIC GRIP: The shape of the carabiner and the locking sleeve are designed to fit comfortably in the hand for repeated clipping and unclipping. LARGE OPENING: The 25 mm gate opening allows easy connection to cables, bars, and large diameter anchors. CAPTIV COMPATIBLE: Compatible with the CAPTIV positioning bar (sold separately) to keep the carabiner correctly oriented and integrated with the lanyard. The Petzl VERTIGO TWIST-LOCK is an auto-locking carabiner designed for use on progression lanyards, such as the JOKO or PROGRESS. Its ergonomic design and simplified locking system facilitate passing intermediate anchors. The TWIST-LOCK mechanism opens quickly with a simple rotation, while the wide gate opening allows for easy connection to cables and bars. The Keylock system prevents snagging, and the reinforced sleeve provides excellent durability in intensive use environments like adventure parks.