Features: 【Guitar Tool for Luthiers Kit】The package includes 1 file to crown the guitar fret, 1 guitar leveling ruler, 2 fingerboard guards, 2 grindstone. Specifications: 【Fret file】 Made of stainless steel and with a rubber handle. With the same submission size on both 2 edges, a narrow threshold crowning file after alignment. Fits most fret specifications in the markets, such as electric guitar, acoustic guitar, bass, ukulele, etc. 【Threshold Leveling Ruler & Handy】Made of stainless steel. The leveling ruler has 4 flat and straight edges that can help detect any discrepancies existing in the height of the thresholds. Guard fretboard designed to protect your guitar or fretboard bass from scratching or damage during folding and polishing. 【Grindstone】Size: 10x1x1 cm; A professional tool for polishing saddles, nuts and frets. Specifications: Material: Stainless Steel Color: Silver Fret File: 185*15*4mm Leveling Ruler: 10.5*5.1*0.2cm Fingerboard Guard: 7.8*2.2/1.3*0.1cm Grinding Stone: 10x1x1cm Package List: 1x Fret is your file 1x Leveling Ruler 2x Guard Fingerboard 2x Grindstone Notes: Colors may be slightly different for different monitors. Please allow slight deviation due to manual measurement.