1.HOW USE?At the beginning of exercise, the silicone grip device was placed in the palm of the hand, and the tension of the hand was followed by the elastic force of the silicone rally device to make a small amount of fist movement. After staying for two or three minutes, the palm of the hand feels sore in his fingers. At this time, his fingers are stretched and stretched outwards. His fingers and fingertips are fully exercised. 2. DIFFERENT RESISTANCE LEVELS & 6 DIFFERENT COLORS : Level 1(6.6LB):Green&Light Blue:For Finger Rehabilitation&Beginners. Level 2(8.8LB):Sky Blue&Blue:For Relaxation&computer workers. Level 3(11LB): Orange&Dark Blue:For Grips Workout&Athletes. Grip ring Rally Value: Level 1(30LB):Green:For Finger Rehabilitation&Beginners. Level 2(40LB):Sky Blue:For Relaxation&computer workers. Level 3(50LB): Orange:For Grips Workout&Athletes