A couple of weeks of exercising twice a day, the difference will be amazing. Best way to cure arthritis pain is exercising the joint rather than taking constant pain killers. Ideal training product for rock climbing, bodybuilding, golf, tennis, squash, racquetball as well as piano, guitar and other musical instruments.Assist recovery post injury. Relieve stress. Office health product for computer keyboard worker. Hand Therapy Balls: Grip exercise ,training finger hand and wrist muscles. 5 balls in different color are different Resistance levels . Multi-step exercise from soft to harder. Improving grip strength, hand endurance, dexterity, muscular tone and fine and gross motor skills.