Kinetic Energy Recovery Rope is used for dynamic vehicle recovery, where vehicles are stuck in mud, sand or snow. It's the safest and easiest product for getting vehicles unstuck. KERR works like a rubber band. One end is attached to the stuck vehicle and the other end to the pulling vehicle. As the pulling vehicle drives forward, it takes up the rope's slack creating momentum and pulling force. Once the rope is tight, it begins to stretch â “ when it reaches maximum stretch, the stuck vehicle will begin to move, using all of the energy built up from stretching the rope like an elastic band. Double Braid rope has a core rope and a cover (jacket) rope. Both core and cover are made in a diamond braid pattern. Rope cover protects the core rope from debris and dirt, which can cause excessive wear and abrasion if it gets stuck between the fibers. It carries part of the recovery load, which allows the load to be evenly distributed. Only use a high-strength fixture that can be securely closed to attach a recovery rope to vehicle. Examples include screw-pin shackles or soft shackles. Work Load Limit (WLL) should be 3X the vehicles curb weight. Look for attachment points on the frame of the vehicle (check owner's manual). Do not attach to a bumper or ball of a trailer hitch. Under load, these can easily be torn off.