The Original water filled tennis trainer. Fill-n-drill is the perfect portable tennis training aid. Simply hit the ball and it Comes back to you
Fill the base with water and it Instantly becomes heavy enough to hold the unit in place. Non-skid pads underneath help keep it stable
Unwrap the cord, hit the ball as hard as you want, and the ball bounces back to you. The harder you hit the faster the ball is rebounded to you
Rubber cord is 15 feet long and stretches to 30 feet for hard hit balls. To shorten the rebound, wrap some of the cord around the base to your desired length
Comes with an extra ball and string and a convenient mesh carry bag
