3 RESISTANCE LEVEL: Its rally value is from 30 to 50 lb. Progressive levels resistance allows the difficulty of each workout to be gradually increased as your grip improves. FUNCTION AND APPLICATION: Hand Exercise Rings build strength in fingers, hand, wrist and forearms. Varied activities, including crushing, pinching and extensions to improve the dexterityof both the fingers and hands. Perfect for athletes, musicians andphysical therapy patients. DESIGNED TO FIT YOUR HANDS PERFECTLY: This grip trainer makes you feel comfortable when do hand exercise. You know these hand strength grip are the right choice. EXERCISE YOUR HANDS ANYWHERE: You can use your hand strengthener at home, office as the rings are lightweight and easy portable. It is perfect for rock climbing, guitar playing or other activities. Retail Package Includes: 3 x Hand Grip Strengthener Rings, 1 x 4x4 Microfiber Cleaning Cloth Hand Grip Strengthener Exercisers, sized especially for female with average hand, elder and youngsters. These hand grip strengtheners strengthen your hand grip and forearm with training in all three major grip areas, namely crushing, pinching andeven extension. Value Package includes: 1 x Green 30-pound resistance (13 kilo) Hand Grip Strengthener Band 1 x Blue 40-pound resistance (18 kilo) Hand Grip Strengthener Band 1 x Orange 50-pound (22 kilo) Hand Grip Strengthener Band