FURREN Guitar Silk Crown Edge File+2 Protectors Square As Shown Steel+Wood Musical Instrument Accessories Wood Handle (1mm, 2mm, 3mm, 4mm)

3. The hand is made of solid wood: excellent grip and operation. 1. Four gauges slot are provided in 1mm,2mm,3mm,4mm. The 1mm slot works for extra narrow frets, likes ukuleles; The 2mm slot works for all standard guitars, bass, banjo, mandolin, guitars; The 3mm,4mm slot works for jumbo frets. That means it'll work on most stringed instruments. 4. Diamond abrasive way to coarse for this application, use fret erasers makes the frets as as buttery. 2. One flat file, works on fret edge and fret end round.You will experience the amazing efficiency of diamond. 5. It is made of high quality carbon steel& firmly coated with diamond-like grits. That the service of this file.