Practice your technique on the training ground this season to maximize precision from anywhere on the field with the Markwort(R) Throw-It-Right(TM) Trainer. The trainer utilizes a color-coded indicator to ensure proper placement of their thumb and fingers while also helping to reduce potential stress on the shoulder or elbow for long-term success on the diamond. Train With Purpose: Training ball features slots along its surface to indicate correct finger positioning Extended rod displays a green and red-coded indicator to illustrate where to place their thumb and reduce stress on their shoulder and elbow Helps build muscle memory to translate proper technique during official games