The Pro Traxion by Petzl is a highly efficient self-jamming pulley. The Pro Traxion can be used for efficient hauling of heavy loads: ideal for big wall climbing. Self-jamming pulleys effectively replace the traditional hauling combination of a pulley and a rope clamp. Since they are simple and quick to install, they are ideal for rescue situations (in crevasse or climbing rescue).
So sorry, but only 4 items are allowed for comparison, so we're comparing the first 4. I blame the gnomes and so should you.
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