Guitar Essential Repair Tool:Includes everything for string changes and set-ups, perfect for maintaining and keeping your instrument in perfect playing condition. Change strings, set intonation, adjust action, check string height and more Three-in-one string changing tool:The three functions of winding, shearing and taper are integrated into one, which is convenient and fast. It can flexibly adjust the string button and replace the string nail, and easily cut off the excess strings. Easy to Storage:Handy carrying case, compact musicians maintenance repair toolkit, ideal gift for beginners or proscenium Application:Specifically created to help complete the most common guitar repairs and adjustments, not only fit for guitar, but also can be applied for other things, like: electric guitar, bass, mandolin, banjo, ukule and so on