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Considered the standard for rescue operations, this style of descender is easy to use and reliable. Popular with fire departments, search and rescue groups, and police special operations. Primarily for rappelling or lowering; may be used as a belay device but significant friction is encountered. Shape dissipates heat and allows for larger ropes. "Ears" help control the rope, reduce the risk of binding, and make it easier to tie off. Forged aluminum for strength; double anodized for an ultra-durable finish. Strength 10,000 pounds or 44.5 kN.