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Wrist Stretcher Finger Gripper Expander Strength Trainer Exercise Silicone Hand Gripper five Finger Pinch Carpal Expanders For Gym Description: 1 gripper/ tensioner is product of effective environmentally friendly silicone It has the benefits of softness, no cracking, long carrier life and no disturbing skin 2 At the start of exercise, the silicone grip ring is positioned in the palm of your hand The rigidity of the hand will persist with the elasticity of the silicone grip and make a small amount of fist movement After two or three minutes, the hands and arms will feel sore At this time, the five arms open and stretch outwards From the palms to the fingertips, they are totally exercised 3 The finger trainer is placed on the finger, and the finger is stretched and compelled to make a joint movement After two or 3 minutes, the finger will really feel sore, and at this time, the finger and the fingertip are fully exercised Specification: Material: environmentally friendly silicone Tensioner: 7*4*1 cm /3*1*0 inch, finger hole: 1 cm/0 inch Grip: 7*1 cm / 2*0 inch