Comparison between Petzl MAESTRO and PETZL I’D for a rescue using twin tensioned haul lines

MAESTRO and I’D allow for efficient hauling, releasing the lock at any time and a controlled lower of the load. The two devices have different ergonomics and different specifications (working load and efficiency). Hauling The MAESTRO’s efficiency enables effective use of simple pulley systems. If a complex pulley system is needed to increase efficiency, it …

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