Guitar Luthier Tool Kit: guitar neck notched edge, guitar fret file, fingerboard, grinding stone, fret rocker. Guitar Neck Ruler: Made of stainless steel, rustproof, sturdy enough for your long-term use. Size: 16.5 x 1.46 inch. Great for checking guitar neck straightness and flat of the fretboard and frets. Fret File: Made of stainless steel and rubber handle. With same filing size on both 2 edges, narrow fret crowning file after leveling. Fit for most fret specification on the markets. Fingerboard: Made of stainless steel. The fingerboard designed to protect your guitar or bass fretboard from scratching or damaging while filing and polishing. Grinding Stone: Professional tool for polishing saddle, nut and frets. Package Includes: 5 or 7 Pieces Luthier Tools Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.