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 , 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.