By attaching these to the fretboard of your guitar, you can always check the scales. They can be used for various purposes, such as helping beginners learn scales, helping intermediate and advanced players memorize scales, and checking the intervals of each string. Suitable for electric guitars and acoustic guitars. For multiple purchases, you can add additional sheets for +¥100 each. Please comment before purchasing. ============================== ■Guitar Accessories >> #QONNYGuitarMaintenance ■Related Products >> #QONNYGuitar ■All QONNY Musical Instrument Products >> #QONNYInstruments ==============================