Two of the main muscle groups in your forearm are the flexor muscles, used when squeezing your fingers, and the extensor muscles, used when extending them. REHABILITATION & PREVENTION – Ideal for supporting rehabilitation from conditions such as rheumatoid arthritis, arthritis, carpal tunnel, tendonitis, tennis elbow, or recovery from a fractured or broken wrist. Also beneficial for those who frequently type, text, or engage in activities that use gripping muscles. ERGONOMIC DESIGN FOR ALL HANDS – Suitable for all age groups and fits a wide range of hand sizes, unlike other bands with small finger holes. Portable and easy to carry in a bag or pocket. You can perform exercises while driving, at the office, or on the go. USE IT ANYWHERE ANYTIME – Our finger extensor exerciser is compact and modern in design. Use it while walking, traveling (by car, airplane, or bus), at the office, at school, while watching TV, or whenever you want to exercise. Hand grip resistance band, finger stretcher, hand extensor exerciser, finger resistance band, hand strengthener, forearm trainer, finger exerciser for guitar players, finger exerciser for arthritis, arthritis hand exerciser, forearm grip workout, grip strengthener.