Spring Stress Ball Grip Strength Trainer Ball Hand Finger Thumb Exerciser Strengthener Enhancer

Feature： 1. Multiple Functions： Can enhance finger flexibility, relieve hand fatigue, exercise hand strength. 2. Easy to Use： You can squeeze it as you like by holding it to relieve stress and make fingers more flexible. 3. High Quality Material： Made of high quality spring steel, corrosion resistant, and can be used for a long time. 4. Safety Design： Plastic cover at both ends of the spring ball can protect the fingers from injury. 5. Lightweight： Easy to carry indoors and outdoors, such as playgrounds, camping, climbing, hiking, etc. Specification： Item Type： Spring Stress Ball Characteristics： Strong, durable, unbreakable, use finger strength and grip strength exercises Material： Spring Steel. Package List： 1 x Spring Stress Ball