Practice has never been easier. The Unique Fill & Drill Tennis Trainer Pro includes a solid base that stays in place when filled with water. The elastic cord winds around the base, and the ball locks into the base pocket. The trainer is a great teaching tool for beginners and intermediate tennis players Fill the base with water and it immediately becomes heavy enough to hold the device in place. Non-skid pads beneath keep it secure Unwrap the cord, hit the ball as hard as you need, and the ball bounces back to you personally. -The harder you strike the quicker the ball is rebounded for you Rubber cord is 15 feet long and stretches to 30 ft for hard hit balls. To shorten the bounce, wrap a few of the cable round the foundation for your desired span A great device to control your strokes, create a faster swing speed, or warm up Perfect for driveways, garages, basements, or bring it to the courtroom along with you Package Contents: 1 x Tennis Trainer Pro
