YAJU Finger Stretcher Hand Grip Strengthener Finger Strength Training Band for Rehab, Forearm Workout, Guitar Finger Strengthener and Climbing Grip Exercise. Ideal for injury recovery or to prevent arthritis, carpal tunnel syndrome or tendonitis and joint pain. Improves finger strength by creating expansion resistance, ideal for fitness, sports enthusiasts, musicians, and more. Designed for a perfect fit in your hand, allowing you to easily perform a full workout without having to readjust your grip strengthener or finger stretcher. You can reuse it on your commute, in the office or anywhere because the finger stretcher is lightweight and easy to carry.how to use:Start training, train on the fingers, straighten the fingers and do open movements. After two or three minutes, the fingers will feel sore. At this time, the fingers to the fingertips have been fully exercised.Quantity shipped: 3 piecesProduct color: blueProduct size: about 75*40*13mm