Notch Jet Step Foot AscenderThe Original Notch Jet Steps distinctive dual cam design leads to reduced spring tension and lower drag. Weight Limit: 152 kg The unique dual cam design minimizes spring tension while decreasing drag. Toothless cams virtually eliminate rope wear and enhance grip strength on wet, muddy, and frozen ropes. Reduced spring tension results in efficient self tending of the climbing line. Ambidextrous design for versatile use.