CMI Corporation Rope Jack

A mechanically useful tool that can be used to tension or lightly lift installed lines, as well as for laying cables. A product that is small and light enough for climbers to carry to high places. Put it in the groove and get a mechanical advantage. Mechanical efficiency: approximately 5:1. No pulleys or extra ropes, lowest weight, lowest resistance. A product that can be quickly and easily installed and removed, and can also be used [topside]. Designed so that it can be used with just one hand even if there is only one person. The length of the rope jack's handle limits excessive loading to avoid rope loss. Using a rope jack, you can tension the rope without any slack, and then descend or lift it easily with your hands and feet without having to reach out. It's not heavy! Rope jacks are another form of forward-moving capture equipment that can be connected to equipment and are approved for long-term subsistence use. Never use a rope jack for transporting human cargo.