SPIN L1 and SPIN L2 SPIN L1 and SPIN L2 are very high efficiency pulleys with swivel. Openable even when attached to the anchor, these pulleys are designed for maximum simplicity in setting up hauling systems or Tyrolean systems, and in the case of SPIN L1, load deviation systems as well. The large-diameter sheaves mounted on sealed ball bearings provide excellent efficiency. The swivel facilitates handling, allowing the pulley to be oriented under load and to directly connect carabiners, ropes or slings.
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