Description: 【Enhance Strength and Flexibility】: This Piano Guitar Finger Strength Trainer is designed to develop and maintain the strength and flexibility of your fingers, hands, and forearms. Its ergonomic design, along with molded finger pads and grips, make your physical training comfortable. 【Simulated Strings】: The piano finger trainer is designed with simulated strings that help string musicians develop and maintain finger calluses, enabling you to strengthen individual fingers and prevent favoring certain. 【Exercise Anywhere】: The finger training device is the ultimate portable workout tool. Whether in the office, at home or on a train, you can maintain the strength and coordination of your fingers, hands, and forearms. 【Quality Material】: The piano guitar finger strength trainer is made from ABS rubber iron material ensuring longevity of use, great for instrument players. 【Compact Size】The hand grip strengthener dimensions is 8.8cmx6.4cmx2.2cm/3.46inchx2.52inchx0.87inch making it compact enough for easy portability, Improving the strength and speed of your fingers. Specification: Material: ABS Rubber Iron Size Chart: 8.8cmx6.4cmx2.2cm/3.46inchx2.52inchx0.87inch Package Includes: 1 Finger Exerciser(4 Pack) Note: Color might be slightly different due to the color calibration of each individual . Please allow slightly measuring deviation due to manual measurement.