This guitar truss rod is made of quality metal material, anti deformation, sturdy, durable. This two way guitar truss rod acts in both directions can adjust the guitar neck. Features: 1.?ANTI DEFORMATION?This guitar truss rod is made of quality metal material, anti deformation, sturdy, durable. 2.?BOTH DIRECTIONS?This two way guitar truss rod acts in both directions can adjust the guitar neck. 2.?EASY TO INSTALL AND USE?Our dual action guitar truss rod is easy to install and use. Convenient to adjust. 4.?TWO WAY ADJUSTMENT?This electric guitar repair wrench is two way adjustment, can be adjusted up, down, left or right. 5.?WIDE SUIT?This 400mm guitar truss rod is suitable for most of guitar. Nesscessory for musican lovers. Specifications: Material: Metal Weight: Approx. 143g Color: As picture shown Truss Rod Length: Approx. 400mm/15.7in Packing List: 1*Guitar Truss Rod 1*4mm Wrench