Helps in rehabilitation after injuries. Relieves stress. Desktop health product for people who work on computer keyboards. Hand therapy balls: grip exercises, training the muscles of the fingers, hands and wrists. 5 balls of different colors with different resistance levels. The exercises at several levels of singles are more difficult. To improve grip strength, hand endurance, dexterity, muscle tone, and fine and gross motor skills. Product descriptions A few weeks of training twice a day, the difference will be incredible. The best way to cure arthritis pain is to exercise the joint instead of constantly taking pain relievers. Perfect training product for rock climbing, golf, tennis, squash, racquetball, piano, guitar and other musical instruments.