Humanized : and lightweight, easy to grip and control, suitable for exercising hand muscles, finger and wrist strengthElastic and : the finger exerciser is made of quality silicone, soft and , strong and sturdy, with elasticity and flexibility, not easy to or fade, applicable for most people, you can use it for hand at different , relieving wrist and finger fatiguethe silicone grip strength trainers you with 6 levels of resistance bands, you can the right levels for your own grip strength, or you can your grip strength by gradually increasing the resistance levels, suitable for different phases of your finger exerciseWide range of users: the hand strengthener relieve wrist bands are suitable for people of different ages, and applicable for rock climbers, tennis players, golf players, baseball players, guitars, pianists, drummers and more, helping people exercise hand muscles, relieve hand fatigue and enhance finger flexibilityEasy operation: The hand strengtheners are easy to use for both beginners and experienced people. You just need to put the bracelet on your wrist, and insert your into the rings, then you are to exercising. It's time-saving and convenient, and you can exercise , office or gym.Material: Silica gelcolour: black+greyPackage Contents:1 x Hand Grip Strengthener kitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.