Kit for finger and arm training: The hand trainer is available in 3 colors and ranges (red 30 pounds - yellow 50 pounds - blue 60 pounds). Thanks to the 3 different degrees of hardness, you can perfectly adjust the level of difficulty to your level Improve mobility of your fingers or restore the function of your fingers and forearms due to illness, which will be a good partner for your hand training. The ideal hand trainer: Thanks to the oval training egg, this hand-finger trainer adapts perfectly to your hand. The surface of the finger trainer is slightly roughened and thus prevents annoying sliding around. This increases comfort and the training effect. Hand trainer set No odor, no stickiness. The training eggs are washable and can be cleaned with water after use. Quality non-toxic hand trainer: The product is made of environmentally friendly thermoplastic rubber (TPR). It is non-toxic and harmless thanks to chemical certification such as PAK, ROHS and o-benzene. It is uniquely designed for long-term and frequent use. Safe, environmentally friendly and even more durable. Hand exerciser Applicable to all people: Suitable for large and small hands, seniors and young people. The hand training device is suitable for a large number of people, especially for the following sports activities: mountaineering, bodybuilding, fitness, tennis, baseball, boxing, golf and shooting. It's also great for PC users (programmers, writers), students (pen gestures), and instrument players (guitarists, bassists, pianists, and violinists). Easy to carry gifts: Single product size: 2.2 " " * 1.75 " " Small and light, easy to carry and fits in your handbag. You can use it anytime anywhere, this is a perfect exercise equipment for men, women, kids regardless of your age and gender. Product s Finger trainer hand trainer set-3packs Therapeutic purposes: Hand Exerciser Set is an ideal training set to improve overall grip strength, improve finger flexibility, avoid stiffness, relieve joint pain while promoting blood circulation in the hand, and prevent an imbalance in the muscles of a single finger due to excessive use. To prevent tension, to improve your flexibility and to relieve pain. Especially in rheumatism where there is inflammation in the joint, it is recommended to move the hand gently and in a controlled manner. Stress Reliever and Hand Exercise: The colored ball has three ranges (red 30 pounds - yellow 50 pounds - blue 60 pounds). Three different degrees of hardness of the grip balls give you the opportunity to steadily increase in forearm training or hand training. The muscle building is promoted and you have a successful change in training. Portable and practical: Mini size, light and small, these balls come in handy and you can hand exercise anytime. While walking, traveling (car, plane, bus), in the office, at school, watching TV, or any other place you want to exercise. Specifications: Size: 2.2 " " * 1.75 " " Color and range: red 30 pounds, yellow 50 pounds, blue 60 pounds Material: TPR Product contains: 3 x hand exercisers