The Club K Spin Right Spinner baseball training aid is the exact diameter and weight of a baseball with 2 sets of realistic seams molded into the edge. Although exclusively used by pitchers for learning proper rotation, it is also a valuable to help teach the proper mechanics of overhand throwing for all players. All pitches can be thrown with the spinner including fastball, split finger fastball, curve, change, slider, sinker, and screwball.

Comes with instructional CD