Features: 1.Guitar Tool Set: Includes 3 files, 3 hex wrenches, 1 screwdriver, 1 ruler, 1 string action ruler, 1 string winder pin puller, helping guitar maintenance and string adjustment. 2.Multiple This tool set can be used for string replacement, tuning, action adjustment, string height check, etc., keeping your instrument in good playing condition. 3.Efficient String Replacement: With the included string winder puller, you can easily replace your guitar strings, saving you time and effort. 4.Versatile Applications: Suitable for various instruments including guitars, bass, mandolins, and banjos, making it a versatile tool kit for musicians. 5.Convenient Storage: The kit comes with a storage bag, allowing you to keep all the tools organized and easily accessible, making it perfect for both professional musicians and beginners. specification:Item Type: Guitar Maintenance Tool Kit Material: Metal, Plastic Functions: String Replacement, Tuning, Action Adjustment, String Height Check, etc. Suitable Instruments: Guitar, Bass, Mandolin, Banjo PackageList: 3 x Hex Wrenches 3 x Guitar Files 1 x Screwdriver 1 x Steel Ruler 1 x String Action Ruler 1 x Guitar String Winder Pin Puller 1 x Storage Bag