Petzl designed the Connect Adjust as a personal anchor system for sport climbers. This device adjusts the included lanyard to give you an ideal distance for setting up a rappel. The adjustable arm also keeps the lanyard secure so you don't slip, and a rubber retainer keeps the adjustable arm in an ergonomic position on the carabiner for easy clipping. Petzl designed the rubber lanyard to fit the Spirit Screw Lock carabiner specifically.