The Petzl Very high efficiency pulley with swivel openable even when attached to the anchor, the SPIN L1 pulley is designed for maximum simplicity in setting up hauling or load deviation systems, and tyroleans. The large diameter sheave mounted on sealed ball bearings gives it excellent efficiency. The swivel facilitates handling, allowing the pulley to be oriented under load, and direct connection of carabiners, ropes or slings.

Triple-action opening of the moving side plate is quick and easy, even with gloves
The rope can be installed with the device connected to the anchor
Red mark provides a visual warning when the moving side plate is unlocked
Special side plate design protects the rope path
Large diameter sheave mounted on sealed ball bearings for excellent efficiency
Swivel allows pulley to be oriented under load
Swivel accepts up to three carabiners and allows the use of ropes and slings to facilitate manoeuvres