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EASY-TO-USE: The Serve Doctor Consists of An Extension Pole with A Rope and hook-and-loop On the End. To Attach a Ball to The Pole, Take A Tennis Ball with Moderate to Full Fuzz and Twist It onto The hook-and-loop.
WORKS WITH ANY BALL: Each Well-Constructed Unit Consists of A 3-Part Aluminum Extension Pole and hook-and-loop System That Attaches to Any Tennis Ball.