Stainless Steel Material: Solid Steel Baoding Balls made of quality stainless steel which is hardened for extreme durability, dont worry about balls chipping or getting damaged, not afraid of water or sweat, not rusty and shiny

Collision Sound: Whole ball is solid, and there is no ring tone difference (a single shaking has no ring tone, two balls collide with a collision sound), resulting sound is crisp and pleasant, making you feel happy

For Medium and Big Hands: Hand ball can be used by most people, 2in medium size, One Pair Weight 2.3 lb, weight is not too light and not too heavy for you to exercise whenever you have spare time

Strengthening Hand and Wrist: Solid steel balls provide an increased heavyweight resistance for working out your hands and fingers, by twisting the fitness ball, the upper limb muscles such as fingers, wrists and elbows can be exercised

Many other Benefits: Such as keeping your hands busy to stop bad habits, help with chi and meditation, increased concentration, and more