Barton Marine Extra Large Wincher Pair Barton Marine Extra Large Wincher Pair. This tried and tested design has been a firm favorite with Sailors for many years.The Wincher works by gripping the rope when the drum is fully loaded and under tension peeling off the line from the underside of the Wincher as you winch to give a true self-tailing motion.Cleating is achieved by locking the sheet into the Wincher's ribbed central groove. Package Contents: Barton Marine Wincher Pair Barton Marine 21644: Extra Large Wincher Pair Barton Marine Extra Large Wincher Pair