Unique rocker bases incorporates a firm but cushioned freeplay as well as the advantage of retracting almost completely from the path of watercraft with flying bridges or wake board towers. Roller tip absorbs forces from wind, wake and wave action along with providing easy access to your boat. Includes positionable tie-off cleat. Each set features a pair of whips, rocker bases, whip and spring lines and innovative one-handed line tensioners for quick, easy setup.