Features: brand new and high quality Diamond abrasive way to coarse for this application, use fret erasers makes the frets as smooth as buttery. 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, , banjo, mandolin, cigar box guitars; The 3mm,4mm slot works for jumbo frets. That means it'll suitable for most stringed instruments. It is made of premium carbon steel& firmly coated with diamond-like grits. That ensure the long life service of this file. One flat file, works on fret edge and fret end round.You will experience the amazing efficiency of diamond. The hand shank is made of high quality solid wood: excellent grip and smooth operation. Specifications: Material: Carbon Steel+Diamond Grits+Wood Handle Products Size:227x20x20mm/8.9x0.79x0.79in Net Weight:163g/0.36lb Package Includes: 1x Fret File 2 x Neck for Protection Sheet. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!