Finger Tip Force Softball No. 2 Ball Finger Tip Strengthening Training Uses a hardball No. 2 softball. Training your fingertips using the seams of a hardball will also help with throwing rubber softballs! Recommended for all players whose throws are unstable and pitchers who want to throw the ball with better spin. Players using a No. 3 ball can also use this as practice to develop their fingertip feel! This is a used item, so please understand.