Description: 【Versatile Neck Correction】: This tool is designed to correct neck and fingerboard warping in a variety of guitars, including guitars. It offers the flexibility to perform either full neck corrections or localized adjustments based on the specific deformation 【Adjustable Tension Control】: Before using, adjust the rod to a neutral position. The correction tool features adjustable tension screws that allow for phased corrections according to the degree of deformation, prevent excessive strain that could lead to fingerboard cracking 【Construction】: Made from aluminum, this tool ensures durability and longevity while maintaining a lightweight design for easy handling during guitar maintenance 【Dimensions】: With dimensions of 505x150x40mm, this correction tool is crafted to provide precise adjustments without compromising on ease of use or effectiveness in correcting guitar neck deformations 【Nice Gift Choice】: An essential tool for any guitarist or luthier, this is a nice gift for enthusiasts and professionals alike Specification: Material: aluminum Size Chart: 50.5cmx15cmx4cm/19.88inchx5.91inchx1.57inch Package Includes: 1x Guitar Neck Calibration Tool Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.