Features 1、【Efficient and Versatile】: Our Guitar Fret File is designed with four edges of different sizes (1mm, 2mm, 3mm, 4mm), making it suitable for all standard guitars, bass, banjo, mandolin, and other stringed instruments. The 1mm slot works perfectly for extra narrow frets, while the 2mm slot is ideal for most stringed instruments. The 3mm and 4mm slots are specifically designed for jumbo frets, ensuring comprehensive functionality. 2、【Premium Quality Materials】: Crafted from highquality carbon steel, our Fret File is firmly coated with diamondlike grits, guaranteeing longlasting durability and superb performance. The wood handle provides excellent grip, allowing for smooth and precise operation. 3、【Exceptional Performance】: Experience the amazing efficiency of diamond abrasive with our Fret File. It effortlessly smoothens and shapes fret edges and fret ends, providing a professional touch to your instrument's playability. Say goodbye to rough edges and enjoy buttery smooth frets. 4、【Easy to Use】: Our Fret File features a flat file design, making it easy to work on fret edge and fret end round. With its four side groove sizes, you can effortlessly cater to different fret widths and shapes. Whether you're a professional luthier or a DIY enthusiast, this file will be an essential tool in your arsenal. 5、【Versatile and Practical】: This Fret File is a musthave for any guitar player or technician. Its versatility extends beyond just guitars, as it can be used on various stringed instruments. The four side groove sizes ensure compatibility with different fret sizes, making it a practical and reliable tool for all your fret crowning needs. Specification Product Material: Carbon steel+diamond grits+wood handle 4 Side Groove Sizes: 1mm, 2mm, 3mm, 4mm Product Size: 22.6 * 2 * 2 cm/8.9 * 0.8 * 0.8 inch Product Weight:150 g/5.3 oz   Package List 1 *  Fret Filebr /2 *  Neck Protection Sheet