Garhauer Marine Rope Clutch / Jammer Available in single, double, triple & quad. *  A variety of either stainless steel or anodised aluminium.  Designed to be reliable and user friendly. Each of the four different options have unique advantages to suit load, application and asthetics. These sail boat clutches are used for controlling high load lines, such as Halyards.  The clutch holds firmly yet allows ease of adjustment when needed.  Backed by a 10 year Guarantee