The hand grip balls are perfect for athletes and common people to increase finger, hand and forearm strength and stamina. Ergonomically designed, it is made with durable material. Perfect hand workout that can be done in your home or office and will build your hand muscle and grip strength. Features - Color: Assorted Color. - Material: TPE. - Size: About5.30X5.30X5.30cm/2.08X2.08X2.08inch. - Made of premium quality material, high elasticity which is durable and lasting for use. - Hand grip strengthen balls, help to reduce stress after working or study for a long time. - Hand therapy exercise balls build strength in the fingers, hands, wrist and forearms. - Rehabilitate and relieve pain using the hand strengthen balls. You will feel a happy mood. - Portable design, perfect hand workout that can be done in your home or office.