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. ARTIBETTER Guitar Accesories Gitarre Instrument Hand Grip Strengthener Musical Instrument Training Tool Grip Strength Trainer Guitar Grip Exerciser Guitar Finger Practice Tool Piano Booster 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: 14.5 x 2.2 x 2.2cm. Package Including 1 x Finger Expansion Sleeves