Humanized design: compact and easy to grip and control, suitable for exercising hand muscles, finger, and wrist strength Elastic and reliable: the finger exerciser is made of quality silicone, soft and durable, strong and sturdy, with good elasticity and flexibility, not easy to break or fade, suitable for most users; can be used for hand therapy in various locations to help relieve wrist and finger fatigue The silicone grip strength trainer includes 6 levels of resistance bands, allowing you to choose the appropriate level based on your grip strength or progressively increase resistance to improve strength, ideal for different stages of finger exercise Wide range of users: the hand strengthener is suitable for individuals of various ages and ideal for rock climbers, tennis players, golfers, baseball players, guitarists, pianists, drummers, and others; helps strengthen hand muscles, reduce hand fatigue, and enhance finger flexibility Easy operation: the hand strengtheners are simple to use for both beginners and experienced users; just wear the device on your wrist, insert your fingers into the rings, and begin exercising; convenient and time-saving, suitable for use at home, in the office, or at the gym Color: black Material: silica gel Package Contents: 1 x Hand Grip Strengthener Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.