Throw like a pro...without the practise! The amazing Swerve Ball is specially designed to make throwing trick pitches easy. Just place your fingers of the specified markers for a certain type of pitch and throw! Swerve Ball allows you to throw curve balls, sinkers, sliders, fast balls, knuckle balls and change ups just by adjusting your hold on it. Swerve Ball is only for use with plastic bats. Ages 6+.