1、【Highly Versatile】: This set of 9 stainless steel radius gauges is perfect for a wide range of string instruments. It is suitable for electric guitars, electric basses, and acoustic guitars. Each gauge is designed to accurately measure the radius of your instrument\u0027s fretboard, ensuring optimal playability and performance. 2、【Comprehensive Size Range】: Our radius gauges come in a comprehensive range of sizes - 7.25\", 9.5\", 10\", 12\", 14\", 15\", 16\", 17\", and 20\". This wide range of sizes ensures that you have the right tool for any guitar or bass, regardless of its fretboard radius. 3、【Easy to Use】: These radius gauges are designed for ease of use. They can measure the radius from either above or below the strings, making it easy to get accurate measurements without having to remove the strings. Plus, they come with a pin puller for added convenience. 4、【Precision Tool】: These gauges are precision tools designed to help you set up your guitar or bass for optimal playability. By using the matching top radius of this gauge, you can determine the proper height adjustment for the bridge saddles, ensuring that your instrument plays its best. 5、【Sturdy and Reliable】: Made from high-quality stainless steel, these radius gauges are built to last. They are resistant to rust and corrosion, ensuring that they will provide accurate measurements for years to come. Whether you\u0027re a professional luthier or a DIY enthusiast, these gauges are a must-have tool for your guitar setup kit.