Markwort The Learning Curve Training Baseball: FIN

Teaches Mastery of the Curveball. Easy to Use Training Aid for Pitchers and Batters. The "Fin" Makes it Easy to Throw the Curveball. Develops Pitching and Hitting Skills. Durable Rubber Construction Makes Ball Easy to Grip while Teaching Proper Finger Placement and Hand Motion to Throw a Curve Ball. Increases the Curve Rate to Provide Pitchers with Greater Visual Feedback to Help Improve the Learning Process. Provides True Pitching Motion and Visible Ball Rotation to Help Batters Improve their Curve Ball Hitting Skills. Recommended for Use with Pitchers Ages 12 & Up and for Batters of all Ages.