Hand training tool for musicians, developed by musicians. It can be used to train and maintain the strength, flexibility, and dexterity of the fingertips, hands, wrists, and forearms required for playing musical instruments. The tension can be adjusted for each finger, from extra light to medium. The reversible grip allows for training of individual fingers or the entire grip strength. Simulated parts allow for training to toughen the skin on the fingertips so that it doesn't hurt when playing the guitar. Convenient design for portability. Planet Waves VARIGRIP HAND EXERCISER is a hand training tool for musicians, developed by musicians. It can be used to train and maintain the strength, flexibility, and dexterity of the fingertips, hands, wrists, and forearms required for playing musical instruments. The tension can be adjusted for each finger, from extra light to medium. The reversible grip allows for training of individual fingers or the entire grip strength. Beginners can develop their fingering skills several months faster compared to training only with an instrument. Simulated string parts allow for training to toughen the skin on the fingertips so that it doesn't hurt when playing the guitar. Pocket-sized and durable construction. You can practice anytime, anywhere, even without your instrument. Thank you for viewing.