Assist recovery from injury. Relieves stress. Office health product for computer keyboard workers. Hand Therapy Balls: Grip exercise, training finger hand and wrist muscles. 5 balls in different colors are different resistance levels. Exercise from soft to multi-step drill hardener. Improve grip strength, hand endurance, dexterity, muscle sound and fine and gross motor skills. Product descriptions A couple of weeks of training twice a day, the difference will be amazing. The best way to cure arthritis pain is to exercise the joint instead of taking constant pain medication. Perfect training product for climbing, golf, tennis, squash, racquetball, piano, guitar and other musical instruments.