The Digi-Flex hand trainers are ideal for strengthening the muscles of the fingers, hands, and forearms. With the hand muscle trainer, you can also improve the flexibility, strength, and coordination of your fingers and hands. Each Digi-Flex is equipped with two spring strengths. Depending on the position of your hand and fingers, as well as the pressing of the buttons, you can train the entire hand or the forearm. An anatomically designed grip is attached at the bottom, allowing the Flex hand trainer or finger trainer to fit comfortably in your hand. The hand muscle trainer offers you various training options and easy handling. The hand trainer is available in different resistance levels. Depending on your strength assessment, we recommend a light, medium, or strong spring for optimal training. Each Digi-Flex hand trainer comes with an instruction manual. Features: Dimensions: approximately 13 x 7 x 1.5 cm, Material: plastic housing, Weight: 150-200 g, depending on thickness.