1Guitar Wrench: The hex wrench is useful to adjust the curvature of the guitar neck, which also has wide compatibility for flexible maintenance. 2Double Headed: The hex key wrench has a flat end on the one side and a ball end on the other side, so as to better meet your various needs. 3Broad Utility: Moreover, the flat end hex key is also a very practical tool for installation, assembly, repair, woodworking, automobile, etc. 4Easy for Work: Conforms to ergonomic design, the hex key wrench has long handle for easier operation, largely improving your working accuracy. 5Premium Metal: Mainly made of premium metal material, the guitar wrench with rustproof coating is not easy to deform, durable for long term use. 1 xGuitar Hex Wrench