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 Kit Material: Metal, Plastic Functions: String Replacement, Tuning, Action Adjustment, String Height Check, etc. Suitable Instruments: Guitar, Bass, Mandolin, Banjo. Package List: 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