The truss rod is a type of bidirectional guitar rod, which can adjust the guitar neck up and down, left and right so that the entire guitar reaches the best condition. - Color: Blue - Total size: 460 x 6 x 8mm - Hexagonal inner diameter: 4mm - Made with high quality metal components - Consistent and durable welding joints - Essential tool for guitar maintenance - Easy to use: "Right to tighten, left to loosen" - Check compatibility before purchasing