1.Exercise Hand grip,finger gripper, 2.fitness strength, power grip,gym,health 3,sport item, piano gift, recovery, ... Available in 4 graduated resistance levels, finger power:5kg,10kg,15kg,25kg ect different power for various people, meet different requirement3, ... circulation to the forearms and hands.7,Simple, effective, build repetitive muscle memory and increase dexterity8,Perfect for training and ...