Feature: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 Features: 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 KitMaterial: Metal, PlasticFunctions: String Replacement, Tuning, Action Adjustment, String Height Check, etc.Suitable Instruments: Guitar, Bass, Mandolin, Banjo.Package List:3 x Hex Wrenches3 x Guitar Files1 x Screwdriver1 x Steel Ruler1 x String Action Ruler1 x Guitar String Winder Pin Puller1 x Storage Bag