Hand Grip Strength Trainer, Stress Relief Ball

The product in the image is a set of three colorful balls, Soft Pink, Medium Orange, Hard Blue Unrivaled Quality - Made of soft, easy to clean thermoplastic rubber. Lightweight, hypoallergenic, and reusable.Exercise Hands - Exercise muscular and finger flexibility, suitable for primary strength training.Reduce Stress - Squeeze, roll or press the ball to relieve tension.Rehabilitation Training – Relax alleviation muscle pain and stiffness, promote blood cycle.