Features: 1. This is an amazing finger strengthener tool for music players or athletes, bring with it, use any time , and see results in their activities, whether that's violin , core conditioning , martial arts , music practice , shooting , or wrestling. 2. Body Builders , guitarists , martial artists , athletes who want maximum performance , rock climbers , musicians , PT patients , and rheumatoid arthritis and joint pain sufferers all have one thing in common. Parameters: Material: plastic Product size: about 26.5 15cm 10.43 5.91in Weight: about 300g Uses: suitable for finger strength training. Features: Made of high-quality material, it can adjust the tension. Employing creative shape, it is comfortable and practical. It can exercise your fingers' flexibility and strength. Packing List: 1 Finger Force Exerciser 1 Manual Notice: 1. Please adjust distance through adjusting screwing rod if necessary, it depends on hands length. 2. It requires a bit of strength during practice process, so it may little hard for kids to use it.Ideal Gift: If you suffer from Rheumatoid Arthritis, Arthritis, Carpal Tunnel, Tendonitis, Tennis Elbow and are on your way to recovery from a fractured or broken wrist, or tendon surgery, then this is the perfect grip for you. Widely used: Daily fitness exercises for middle-aged and elderly people finger strength rehabilitation training, promote blood circulation, relieve mental stress, increase hand muscle strength, and prevent muscle atrophy. USE IT ANYWHERE: Our Exerciser Finger Extender is small in size and modern in appearance. It can be used while walking, traveling in the office, school, watching TV, or anywhere you want to exercise. Easy Exercise: Our finger resistance bands can improve finger strength for athletes (climbing, fitness, tennis, baseball, boxing, tennis, golf and shooting enthusiasts) and musicians. Advanced Technology: This device effectively challenges each finger individually using comfortable grips with spring loaded finger piston technology for maximum flexibility.