[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 or 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.