Openable even when attached to
the anchor, the SPIN L1D pulley is designed to be used in conjunction
with a descender for maximum simplicity in setting up a deviation for a
heavy load. The faceted sheave only rotates in one direction, providing
excellent efficiency when hauling and adding friction zones for the rope
for additional braking when lowering. The swivel facilitates handling,
allowing the pulley to be oriented under load, and direct connection of
carabiners, ropes or slings.