Medium Wincher PairThe Barton Wincher is a specially designed rubber molding that converts your standard winch into a self-tailing winch. 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.Technical Specifications: Fits Drum Diameter - 2.75" to 3" (70 to 80 mm) Maximum Rope Diameter - .39" to .55" (10 to 14 mm) Weight - 7.87 oz (223 g) *Sold as a Pair Brochure (pdf)