Item Type: Guitar Truss RodMaterial: MetalLength: Approx.455mm/17.9in 12 Way Truss Rod: This is a 2 way electric guitar adjustment rod with a total length of 455mm for you to use, professional and practical. 2Luthier Essential Tool: Used to make or repair electric guitar, bass, etc., which is a must have tool for professional luthier shops and home stores. 3Excellent Metal Material: Made of excellent metal material, has high mechanical strength, not easy to age, strong and durable. 4Exquisite Craftsmanship: Processed by exquisite craftsmanship, stable and reliable in performance, allowing you to use for a long time. 5Easy to Use: This truss rod is easy to use, providing great smoothness and convenience for your fabrication or repair work.