Finger Grip Exerciser Bass Guitar Piano Sax Player w/ Adjustable Spring Strength. ! Only $39.95ea. ! 1. The unique extendable finger exerciser is a perfect tool for beginner guitarists and pianists, which can help build up the strength of your little fingers. 2. For pro players: strength and flexibility is very important, especially when playing challenging SOLO places where a high skill level is required and the little finger is used a lot. 3. Tension range: 2.5lbs-6lbs. 4. For bass guitar piano and other instruments players. 7 days money back guarantee. Returned items must be in original condition and packaging with no signs of wear. Customer pays return shipping.