PETZL Evolv Adjust Positioning Device 3" high 4" wide INTENDED USE: The EVOLV ADJUST positioning device allows you to always have the perfect length adjustment for aid climbing and the extra level of safety in case of a short fall. EASY TO USE: The ergonomic shape of the arms allows you to quickly and precisely adjust the length from 15 to 150 cm. SECURE: The connector is held in place by a rubber ring that helps facilitate clipping. CARABINERS: The EVOLV ADJUST is used with two SPIRIT SCREW-LOCK locking carabiners. ATTACHMENT: Attach the EVOLV ADJUST to the tie-in points of your harness with a girth hitch knot.