No Prior practice is required to throw the ball. World?s Fastest ball thrower. Speed from 60km/h to 160 km/h to suit all age groups. Easy on shoulder. Most accurate ball thrower. Interchangeable ball holders for better sighting of the ball. Simulates hand, wrist and fingers to grip the ball firmly. Almost unbreakable. Suitable for High Catches, Flat catches and fielding drills. Nine throwing length options to vary the speed and throw different types of balls. Suitable for most of the ball sizes and weight. Cricket Balls - Baseball - ?? Tennis Ball - ? Slaz Ball - Wiffle/Plastic ball - Leverage SpingBall - Leverage BananaBall - Smiley Sponge Ball - Changeable Ball Holder direction for more speed and different angles Inter-changeable Ball Holder For Better Sighting of the ball: Use White Cup for Red Ball Black Cup for white ball For Concentration: Use White Cup for White Ball Black Cup for Red ball