Very high efficiency double pulley with swivel
Openable even when attached to the anchor, 
The SPIN L2 is a double pulley designed for maximum simplicity when setting up hauling systems or tyroleans.
The two parallel-mounted sheaves and auxiliary attachment point allow the pulley to be used for setting up various types of complex haul systems
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 direct connection of carabiners, ropes or slings.