Maintain the health and performance of the fingers and hands with Gripmaster. It is uniquely effective because each finger is isolated and flexed on an individual spring-loaded button. Gripmaster delivers total conditioning for each individual finger, the entire hand, wrist, and forearm. Beginners will leap months ahead in fingering strength and ability while professionals can easily warm up before performances. With the pocket-size and durable design you can work out anytime, anywhere - even when your instrument is not available. Available in: Light, Medium.