Feature:1. This ball is made by TPR with firm fingers holes, can be squeezed and pressed as often as possible, harmless to fingers and palm.2. It can help user exercise grip strength and recover strength finger and forearm muscle .3. The training ball is designed with multiple convex points to massage the palm, activate the acupuncture points, and promote blood circulation.4. Effectively relax your hands, relieve your fatigue, relieve spasm finger, numb to help hand therapy.5. Suitable for two fingers grasping with ergonomic oval design, and not easy to slip from the palm.Specification:Item Type: Hand Therapy Grip BallsMaterial: TPRSize: Approx. 10 x 8cm / 3.94 x 3.15in.Suitable Crowd:1. People who need exercise the thumb longus and extensor tendon to prevent and correct contracture stiffness.2. People with wrist extensor and finger extensor paralysis (radial nerve paralysis)3. Hemiplegia patients with finger and wrist dysfunction, weak finger and wrist, wanting to improve muscle strength and joint activities of relevant parts through training.4. Controls the increase in flexor tension and the atrophy of the thenar.5. Prevent finger flexion, spasm, knuckle deformation and deformity.6. Correct the fingers while assisting in training the flexibility of the fingers.Package List:1 x Finger Exerciser Ball