Professional outdoor climbing equipment, high-quality staff, the ultralight aircraft dedicated 】 【 6061 aluminum alloy material, toughness, corrosion resistance, super light, for young and old, built-in spring shock absorber, cushion movement of wrist arm shoulder, scientific and effective to reduce mountaineering consume - scale control system, equipped with professional fastener and spin lock device, according to the need to implement safety lock quickly, easy to carry!