Designed to develop and maintain the strength and dexterity of your fingers and hands, the Varigrip 19s ergonomic design and variable tension provides customized conditioning for individual fingers, the entire hand, wrist, and forearm. The reversible molded grip even uncovers simulated strings to help develop and maintain finger calluses when you are away from your instrument. Planet Waves Varigrip, the ultimate conditioning tool for musicians.
eBay