1、MAIN PURPOSES: These erasers are designed for cleaning and polishing the neck, suitable for various guitar neck materials, simple and practical. 2、FOR NECK CLEANING: Used to clean the string slots and copper pads on the guitar neck, removing dust, dirt, and debris to provide clearer performance. 3、FOR NECK POLISHING: This eraser also provides a polishing effect, making the neck surface smoother, helping to reduce friction between the string and the neck. 4、DURABLE MATERIALS: These polishing blocks use excellent rubber and emery abrasive, wear resistance, scratch resistance, and have a long service life. 5、COMPACT SIZE: These fret polishing erasers have compact size, easy to control and use, suitable for electric guitar, folk guitar, and classical guitar, etc. 3 x Guitar Fret Erasers1 x Storage Box Item Type: Guitar Fret ErasersMaterial: Rubber, Emery