Features:Improve strength and flexibility: You can buildand maintain strengthand dexterity with this finger strengthener. Practise your fingers, hands,and forearms. Nice for practicing strength for piano, guitar, climbing, gymnastics, hunting, fitness and games and so on. Suitable for string musicians, athletes, etc.Visual Tension Adjustment: You can adjust the resistance level according to uyour needs. Adult: 3-7 pounds, children: 2-5 pounds.Durable Material: Made from premium ABS material, its durable for your daily use. Each button is flexible, not loose and for long lasting use. Soft silicone at the bottom and top, comfortable grip, sweat proof and antiskid.Easy to Carry: It has a suitable size, and its very mini, light weight and portable, weighs only 65g / 2.3oz, so you can take it anywhere as desired no matter you are at the office, at home or on the train.