PETZL - JOKO-I, Pulley Lanyard INTENDED USE: The JOKO-I pulley lanyard is designed to connect TRAC pulleys to the seat harness. DESIGN: This lanyard attaches to your harness with a simple lark's head hitch. EASY TO USE: The ends are equipped with plastic sheaths that help hold the carabiner in place. DURABLE: The sheaths also help protect the stitching from abrasion. OPTIONS: Choose from 30, 45, and 70 cm lengths. Available as individual units and in packs of 10.