Varigrip Variable Tension Hand Exerciser
The Varigrip's 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.
The Varigrip conditions your fingers, hand, wrist and forearm with adjustable tension and even simulated strings to keep your fingers in playing shape even when you're away from your guitar or other sport that requires your hands.
Set tension from light to hard individually for each finish, so if you've got weak pinkies, build them up to snuff.