Tourna Fill-N-Drill Ball Type_Doubles Provides constant uniform compression and

Provides constant uniform compression and support

They stay on to help protect against rubbing and blisters

a revolutionary

Providing the unparalleled triple oscillation found on Model 2

Tourna Fill-N-Drill Ball Type_Doubles Provides constant uniform compression andNo practice partner? No open tennis court? No problem! Practice your forehand, backhand, serve and overhead smash by yourself with the Fill N Drill Tennis Trainer from Unique. Use it in a tennis court, driveway or garage. When filled with water, the Fill N Drill weighs 43 ounces. That's heavier than if it was filled with concrete. When empty, the trainer weighs a modest 7 ounces making travel a breeze. Strong rubber cord returns the ball every time.