For sports you need to hold the instrument, this is a good tool that strengthens each finger separately, will gain strength in his hands and also worked flexor tendons of the wrist and allowing the fingers to move and pass the forearm. Serve only to athletes but also for therapists who try to rehabilitate the power of hands and fingers of each separately. This is a small product that really do not know if I’ll buy it, but obviously, once you’re close, there is no cost out of pocket or purse and began to play with her fingers while we strengthen.