The RoboArm is a ball throwing aid for batting and fielding practice.
This innovative patent pending ball throwing aid has a tiltable ball holder, which helps in throwing the ball at higher speeds without changing the natural throw of a person.
First time users, insert the key pin into No.5 Hole and throw the ball with the round arm action.
If the ball pitches short, increase the hole number and if the ball goes full toss, decrease the hole number.
The Hole Number which allows the ball to pitch at the desired spot is your natural throw number.