Guitar Fret Crowning Luthier File Guitar Fret Trimming Repairing Tool With 2 Pcs Neck Protection Instruments Wooden Accessories _x000D_ About the product _x000D_ 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, cigar box guitars; The 3mm,4mm slot works for jumbo frets. That means it'll work on most stringed instruments. _x000D_ 2. One flat file, works on fret edge and fret end round.You will experience the amazing efficiency of diamond. _x000D_ 3. The hand shank is made of solid wood: excellent grip and smooth operation. _x000D_ 4. Diamond abrasive way to coarse for this application, use fret erasers makes the frets as smooth as buttery. _x000D_ 5. It is made of high quality carbon steel& firmly coated with diamond-like grits. That ensure the long life service of this file. _x000D_ _x000D_ _x000D_ _x000D_ Description _x000D_ Material: carbon steel+diamond grits+wood handle _x000D_ Products Size:227*20*20mm/8.9*0.79*0.79in _x000D_ Net Weight:163g/0.36lb _x000D_ _x000D_ _x000D_ _x000D_ Package Included _x000D_ 1x Fret File _x000D_ 2 x Neck Protection Sheet _x000D_ _x000D_ _x000D_ _x000D_ _x000D_