Works as a hand therapy ball (light and medium tensions) for increasing strength and range of movement. Perfect for late stage exercise rehabilitation of all finger, thumb, hand, wrist, carpal tunnel, forearm & elbow conditions and it is your super-easy hand strength training.<br> Exercises the frequently ignored extensor muscles to guard against and help relieve the symptoms of carpal tunnel, arthritis and repetitive strain injury. Provides basic grip training for rehabbing hands.<br> A grip strengthener that properly addresses the kinetic chain of grip, A powerful & easy-to-use exercise therapy & rehabilitation device, A market-changing proactive ergonomic exercise.<br> Makes performance training, hand muscle strengthening and general wellness simple. If you use your hands to grip or grasp in sport, musical pursuit, workplace or hobby, hand muscle imbalance is a given, not a maybe and your health & performance is at risk.<br> Performance and balance solution in: Sports, Music, Workplace Ergonomics, Computers, Smart phone& Video Games ,Hobby<br>Note: <br>1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. <br>2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!<br>About Shipping: <br>1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly.<br>2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.<br>3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 96 hours, wish you a happy shopping!