This is the lightweight rescue pulley you've been waiting for. The SMC CRx 1 Pulley is incredibly strong, yet weighs a mere 1.8 ounces. Easier to carry in your life jacket pocket or swiftwater rescue kit than other, heavier pulleys. The pulley works great in Z drag 3 to 1 extraction systems, rated at an amazing 22kN 4,946 lbf load strength. High strength aluminum sides keep it light while a stainless steel axle resists corrosion. Also features a durable and smooth running DelrinAR sheave. This pulley has the required prusik minding capability for use in 3 to 1 mechanical advantage systems, making it easier to haul or lower heavy loads.