Petzl VERTIGO Twist LockDescription Designed for use at the end of a PROGRESS lanyard May be used with a CAPTIVO positioning bar to favor loading of the carabiner along the major axis, to limit the risk of it flipping and to keep it integrated with the device Facilitates handling when passing intermediate anchors: ergonomic shape for excellent grip TWIST LOCK automatic locking system is easy to use. It is unlocked by a simple rotation wide opening for easy connection of the