Description The fact that the fingers can't be crossed often limits the improvement of the performance level, and insisting on training to improve the basic skills is the king. This span trainer is continually improved to help the player solve the problem of the fingers being unable to open and increase the flexibility. It can be carried around when you are free to play the piano/guitar. Features - Color: Blue. - Material: Plastic. - Size: 13.9 x 2 x 2.1cm. - High toughness, elasticity, smooth surface, easy to clean, and constant. - The spreader is used without a piano, so it is easy to carry around. - Improve finger span and flexibility, improve finger function and improve playing efficiency. - The use process does not affect other activities of the finger. Package Including 1 x Finger Expansion Sleeves ARTIBETTER Hand Grip Exerciser Hand Strengthener Grip Guitar Trainer Tool Guitar Finger Practice Tool Finger Expansion Sleeves Stretcher Accessories Enhancer Finger Force Exercise Device Finger Expansion Sleeves Guitar Trainer Tool Finger Force Span Musical Instrument Accessories for Ukulele Piano Beginner The spreader is used without a piano, so it is easy to carry around. Improve finger span and flexibility, improve finger function and improve playing efficiency.