Incredibly efficient knee ascender system for SRT tree climbing. Equipped with the Turbochest rope clamp that features two rollers that help with climbing efficiency by making the upward glide much smoother. The foot-loop is made from robust 4 mm cord and is fully adjustable in length. The high-quality bungee cord delivers immediate reaction during progression and can be installed into the special routing points on the chest parts of the Tree Access SRT Chest and Tree Access XT harnesses, or it can be rigged to any tree climbing harness. WARNING: the Turboknee System is a climbing aid device for progression only and must never be used to for life safety functions.