ThePlanet WavesVarigrip Hand Exerciserhand fitness tool is designed to develop and maintain the strength and dexterity of your fingers and hands. Built-in simulated guitar strings help build finger calluses.

Specifications:

• Ergonomic design and variable tension
  Provides customized conditioning for fingers, the entire hand, the wrist and forearm.
• Reversible molded grip
  Uncovers simulated strings to help develop and maintain finger calluses.
• Individual adjustable tension for each finger
  Allows you to set the tension from light to hard.
• Soft overmolded finger pads
  For added comfort.