[High quality Material]-Made from high quality stainless steel with a a rust resistant coating, well made and durable
[Unique Spring Constructure]-Unique excerise ball with spring contructure ensuring life-long durability and make it a great gift
[Reduces Stress without Creaking]-Relieve daily stress and strengthen your hands or fingers with simple exercises, and it is free from creaking noises
[Practical Function]-Keep your fingers, hands and forearms supple and strong with simple daily exercises.Improves strength, prevents stiffness and relieves joint pain
[Compact Design Portable and Lightweight]-Allow you to exercise your hands and fingers anytime you want and anywhere you want, having the eggs nearby at work helps you take a short break when you are tired or stressed to relax and refresh your mind