Diamond file can almost file anything can be frustrated move tool plate and even hardness 69 mysterious high speed steel stick fire hard alloy、 high hardness steel、 ceramics、 glass and other、 such as bearing、 mould、 gear industry production and processing of the workpiece. Standard shape: flat、 round、 square、 triangular、 semi-circular、 sharp knife shaped、 flat、 round、 ellipse、 triangle two side. Selection process: the use of electro deposition technology、 diamond plating applied in the filing of the hard materials. Skills of using diamond files: add water loss can delay the diamond files