The Miller Vi-Go Ladder Climbing Safety System
http://www.safetyandhealthmagazine.com/articles/15061-ladder-climbing-safety-system
The Miller Vi-Go Ladder Climbing Safety System provides the ultimate in safety, with continuous fall protection when climbing fixed ladders. The system is available in an easy-to-install kit or as a build-your-own option. The uniquely designed, patent-pending Vi-Go Cable Sleeve automatically bypasses intermediate cable guides, keeping both hands free for climbing. It travels smoothly along cable and locks instantly in the event of a fall to provide uninterrupted fall protection.