These UV-resistant plastic clips simplify fender height adjustment.Fender Tender II simplifies the handling and relocation of boat fenders. Use to clip your fenders to rails, lifelines, side wing windows or cleats. They slip onto 7/8'' or 1'' rails or sailboat lifelines and stay put. Quick adjustment without knots.Uses 1/4" to 3/8" (6mm to 9mm) diameter nylon line (sold separately)Sold in pairsMade of tough, sun resistant plastic for many years of useHelps tidy up your boat