Main Function: Our finger strengtheners are designed to develop and maintain strength and dexterity in your fingers, hands and forearms, available in 4 different tension levels, allowing you to switch to a new device as you progress, convenient and practical. Optional Tension Levels: The tension of this grip strengthener starts from 1.2 - 5 kg/ 2.65 - 11 lbs per finger, which is an accessible entry point for beginners, gradually strengthens the tension levels, an easy and convenient way to build endurance in your hands. , wrists and forearms Ergonomic design: these hand exercises are designed with ergonomic palm grip, which will provide you with customized conditioning for individual fingers, entire hand, wrist and forearm, safe and comfortable to use Fine workmanship: our finger strengtheners are made of quality plastic and springs, durable enough for you to exercise each finger as well as your entire hand, suitable for those who need finger strength, such as athletes, guitarists, pianists, accordionists, violinists, hand reconstruction patients, etc. Package includes: you will receive 4 pieces of different levels of finger strengtheners in one package, come with 4 different colors for easy distinction, each hand exerciser measures approx. 8 x 9 cm/ 3.1 x 3.5 inches, compact and lightweight size allows you to carry it easily