[Finger Expansion]Effectively solve the problems of soft and weak fingers, hand collapse, and insufficient finger span. You can practice four fingers or two fingers. Finger holes are 20mm/0.8inch.If you feel the finger holes are too small, you can tear down finger cots. [Increase Span]This tool can help you quickly open your finger and increase the span; stretch the ligament and increase the strength to make the finger softer; continuous training can improve basic skills and exercise your fingers. [Ergonomic Design]The adjustable design is more ergonomic; it brings you the comfort of imagination. The finger position is made of soft silicone material, which is comfortable and convenient to use. [Easy to Carry]The finger cots are made of high-quality and environmentally friendly materials, with strong toughness, not easy to damage, reliable quality, and can be used for a long time, practice, and use anytime, anywhere. [Fingers Practicing Device]Open the finger joints to make string pressing easier. An essential artifact for stretching fingers and practicing musical instruments, suitable for guitar ukulele, violin, piano beginners. Material: ABS, silica gel, stainless steel colour: white Package Contents: 1 x Guitar Finger Expansion Only the above package content, other products are not included. Note: Light reflection 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.