The Dunlop DGT301 System 65 String Change Tech Kit has everything you need to change strings, whether you need to do it quickly in the middle of a set, or you have the time to give your guitar the dedicated attention it deserves. The string change kit includes a bonus System 65 Body and Fingerboard Kit—including Formula 65 Cleaner-Polish, Fretboard 65 Ultimate Lemon Oil and two Polish Cloths—for when you want to give your instrument some TLC in the middle of a string change.