A stress ball or hand exercise ball is a malleable toy, usually not more than 7 cm in diameter, which is squeezed in the hand and manipulated by the fingers, ostensibly to relieve stress and muscle tension or to exercise the muscles of the hand.

• Finger Exercise: The devices provide a means to initiate muscle tension, coordinate a firm grip, and assist to build and maintain safety. If you are doing finger recovery training, it is perfect for you.
• For all people: Whether you are using it to restore the function of your fingers, or as a tool for finger relaxation, it can play a great role. It can improve the finger strength of athletes (rock climbing, fitness, tennis, baseball, boxing, tennis, golf, and shooting) and musicians (guitarists, bassists, pianists, and violinists).
• Its tension value ranges from 3kg-5kg (different colors represent different tension values). Total finger intensive training for all fitness levels from beginners to advanced levels.