The truss rod is a type of two-way 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: 600 x 6 x 8mm - Hexagonal inner diameter: 4mm - Made with metal components, the solder joints are in place and consistent - Necessary tool for guitar maintenance - Remember "Right to tighten, left to loosen" to use the 2-way guitar rod - Check compatibility before purchasing