Automatic pass-through cable guides secure lifeline to prevent cable wear and enable the system to accommodate curves. Cable sleeve sold separately. Easy, one-hand operation for attachment/detachment from the system. The Vi-Go Cable Sleeve is constructed with durable, corrosion-resistant aluminum and stainless steel components. Uniquely-designed, patent-pending Vi-Go Cable Sleeve automatically bypasses intermediate cable guides, keeping both hands free for climbing: travels smoothly along cable and locks instantly in the event of a fall.