New Variable Hand Finger Strength Tension Exerciser Grip Trainer For Piano

Feature: \n 1. The exerciser is made of quality materials with fine machining, sturdy and durable\n2. Spring structure with comfortable buttons, great resilience is good for training the fingers\n3. 5 pressing keys to practice finger-interval, with 2 holders to keep the keys down\n4. Good tool for pre-show or warm-ups practice and maintaining conditioning when away from your instrument\n5. Applicable to many instruments, piano, guitar, etc \n\nSpecification: \n\nFeatures: \n\n--\n\nThe exerciser is made of quality materials with fine machining, sturdy and durable. \n\n--\n\nSpring structure with comfortable buttons, great resilience is good for training the fingers.\n\n--\n\n5 pressing keys to practice finger-interval, with 2 holders to keep the keys down.\n\n--\n\nGood tool for pre-show or warm-ups practice and maintaining conditioning when away from your instrument. \n\n--\n\nApplicable to many instruments, piano, guitar, etc.\n\nSpecification: \n\nMaterial: Plastic + Metal \n\nCol: