The Tandem Cable Pulley by Petzl is a double pulley with stainless steel sheaves designed for Tyrolean traverses on cable or rope. The Tandem Series of pulleys are designed for movement on a Tyrolean traverses. The in-line sheaves and fixed side plates make them very stable. The three versions allow for numerous configurations, depending on the bearing and the efficiency required. They are simple to use and can also be integrated into complex hauling systems.
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