Liquid Forces fender features their durable, non-marking, high-density 2-TUFF EVA foam con- struction for ultimate protection between your boat and parking/docking surfaces. Secures quickly with LF easy-to-use cleat attachment system to protect your boat from docks, pilons, or other boats. The locking system is SUPER easy to use! Simply loop the line over the cleat or piling and pull the knotted end toward you. As you pull, the rope locks into the cleat. To release or re-adjust, simply pull the rope away from you.