Very high efficiency single pulley with swivel Openable, even when it is fixed to the anchor, the SPIN L1 pulley is designed to simplify as much as possible the installation of pulley systems, zip lines or load deflection systems. The large diameter sheave on sealed ball bearings gives it excellent performance. Handling is made easier, thanks to the swivel allowing the pulley to be oriented under load and the direct connection of carabiners, ropes or straps.