ITSSMART hand trainer, suitable for developing the muscles of the hands, forearms, recovery from injuries

Can be ordered with or without backlight

From the reviews: "A really useful simulator - it strengthens your arms. It's good that you don't need batteries. You just need to catch the moment of resistance and try to hold the ball in circular motions."
ITSSMART hand trainer, suitable for developing the muscles of the hands, forearms, recovery from injuries0
ITSSMART hand trainer, suitable for developing the muscles of the hands, forearms, recovery from injuries1
ITSSMART hand trainer, suitable for developing the muscles of the hands, forearms, recovery from injuries2

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