This helps with extending your fingers for playing the Guitar or Bass or Ukuleles or Mandolins or Piano or Banjos or Saxophone and all other keyboard musical instrument. This finger extender is mainly used for adult beginners of musical instruments to practice finger extension and stretching, allowing you to quickly extend your fingers to play instruments such as guitar or bass or ukulele or piano or banjos or saxophone. This musical instrument finger trainer is fixed with screws, which can be adjusted according to the span of your fingers to fix it to a very suitable position. The guitar finger stretching trainer is made of upgraded ABS material. It is strong, not easy to break, small in size and easy to carry. It is a perfect training artifact. You may feel a little uncomfortable when you first use training, but don't be discouraged. I believe that in just a few days of practice, your fingers will become more flexible and stronger. Model Number: Finger Extensor Type: Other size:22 x 2.3cm Material:ABS resin colour:black Package Contents: 1 x Finger expander 2 x Pole Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.