Features:The bridge saddle and nut are made of bone, much harder and allowing better tone quality.The saddle can be cut easily using a junior hacksaw and filed to the correct length for your guitar.Files set are made of stainless steel material, sturdy and durable, also anti-rust.The files set is equipped with 13 round files for polishing the string slots and making slots smooth, and 1 flat file for burnishing the nut and bridge.The sand paper can be used to polish the fret board, fret, sides and strings, etc, which enable you to adjust the high of saddle and nut anytime.Four terms coming in combo, very useful and practical for guitarists.Specification:Condition: 100% Brand New and High QualityFiles Material: Stainless SteelSaddle and Nut Material: Cattle BoneColor: Shown as picturesNut Size: Approx. 43x6x9mm/1.69x0.23x0.35inchSaddle Size: Approx. 72x3x9mm/2.83x0.11x0.35inch13 Round Files Diameter: Approx. 0.4-1.6mm/0.014-0.061inchSand Paper Size: Approx. 9x7cm/3.54x2.75inchFiles Quantity: 13 Round Files 1 Flat FileSand Paper Quantity: 9Pcs(3 Pcs 320 grit, 6 Pcs 240 grit)Weight: Approx. 40gPacking List:1 x Guitar Nut1 x Guitar Saddle1 x Files Set9 x Sand Paper(3Pcs 320 grit, 6 Pcs 240 grit)