Feature:1. [4 in 1 Design] This guitar radius gauge features 7.25in, 9.5in, 10in, 12in on each side, allowing for accurate measurements of fingerboard radius, suitable for most guitars.2. [Accurate Radius Identification] With this measuring tool, you can quickly and accurately determine the curvature of fingerboards or saddle nuts.3. [Stainless Steel Construction] Crafted from sturdy stainless steel material, this fretboard radius gauge is sturdy and built to last, ensuring long term use.4. [Multi Instrument Compatibility] This saddle nut radius gauge is compatible with a range of string instruments such as guitars, basses, banjos, ukuleles, mandolins, and more.5. [Compact and Portable] The fingerboard measuring tool is compact and easy to carry, making it convenient to bring along for gigs, rehearsals, or tuning sessions.Specification:Item Type: Guitar Fretboard Radius GaugeMaterial: Stainless SteelSpecification: 7.25in, 9.5in, 10in, 12in.Package List:1 x Guitar Fretboard Radius Gauge