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At hand and fingers that often occurs when you wake up.
Size is approx: Dia 6.3CM
Exercises to strengthen the finger knuckles without injury. Do it to help relieve strained .
The balls are also useful in the relief of stress.
Squeeze Ball that will make you relaxed your hands.
It allows the holder to exercise all of the cells effectively.
Flexible soft awesome stress relief squeeze venting balls.
If you feel angry, but do not know how to vent.
Material: PU Foam
Package included: 6 x Squeezing balls