[3 Resistance Levels] - 3 different colors represent three different resistance levels: Finger Gripper (Green=7lbs, Blue=10lbs, Orange=10lbs), Hand Exerciser (Green=30lbs, Blue=18, 2 lbs, orange = 50 lbs), which for different training levels, from beginner to advanced. [Ideal for] - It can improve finger strength for athletes (climbing, fitness, weightlifting , Tennis, Baseball, Boxing, Tennis, Golf and Shooting) and Musicians (Guitar Players, Bass Players, Pianist and Violinist) [Ergonomic Design] - The strength trainers are ergonomically designed and well suitable for most hand sizes, perfect for teens, women, men or seniors to practice all 4 main types of grip training (grinding, bringing together, supporting and extending) [Lightweight and Portable] - Exercise in your hands and forearms from anywhere, whether you are y at home, in the office, on foot, in the car or doing your favorite sport because the kit is light and easily transportable. [High Quality] - but they are made of 100% eco-friendly high quality silicone environment that feels comfortable when you do your share of exercise.