Guitar Finger Exerciser, Hand Strengthener Trainer Tension Exerciser Grip Musical Instrument Accessory for Piano (Gray)

HIGH QUALITY MATERIAL: The finger exerciser is made of plastic and metal, all them have high quality, with fine machining, it is sturdy and durable. UNIQUE STRUCTURE: Spring structure and great resilience is good for training the fingers. With buttons, this Hand Strengthener Trainer will make us comfortable. FUNCTION: 5 pressing keys to practice finger-interval, with 2 holders to keep the keys down. The finger exerciser is a good tool for pre-show or warm-ups practice and maintaining conditioning when away from your instrument. APPLICATION: For Guitar, Piano, Golf, Tennis & Physical Therapy starter, all you can use this finger exerciser to practice your tension, grip and strength. GUARANTEE: If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem.