Item Type: Guitar Repair ToolMaterial: Metal + ABS 1REPAIR TOOL SET: This guitar tool set includes common tools needed for guitar repair and measurement, meeting your various work needs. 2UNIVERSAL USE: Not only suits for both acoustic and electric guitars, but also for bass, banjo, mandolin and many other strong instruments. 3CONVENIENT USING: Can be applied to change guitar string, tuning, measuring, repairing and so on, and the operation is very to complete. 4GOOD MATERIALS: Mainly made of premium metal and ABS materials, all these guitar maintenance tools has great durability for long term use. 5EASY CARRYING: The storage bag will store the tools in an orderly way while taking little space, which also adds more convenience to your carrying.