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The new SMC CRx (Crevasse Rescue) Pulley is a full-featured pulley specifically designed to be small in size and weight, yet extremely strong and efficient. This new pulley is ideal for use in a 2-to-1 C-system or as a 3-to-1 Z-system and includes prusik minding capability. Ideal for rescue use by those who demand the lightest, strongest pulley available. Easy to use and easy to carry, this pulley also has color-contrasting aluminum rotating side plates for simple rope insertion and removal.