Fill & Drill Tennis Trainer

What better way to practice your strokes while telling the neighborhood kids  “Get off my lawn!”1 Set Tennis Trainer Tennis Base+Training Ball with Rope
The perfect portable tennis training aid. Simply hit the ball and it comes back to you!
Unwrap the cord, hit the ball and the ball bounces back to you. The harder you hit, the faster the ball is rebounded to you.
Fill the base with water or sand and it instantly becomes heavy enough to hold the unit in place.
Great for driveways, garages, basements.