Feature1. Upgrade the open files 17/12, more reasonable2. Configuration double taper path file3. Redo Shaping file4. Integrated material adjustment, more gentle-Retain more dentin crests and provide convenience to root canal doctors who like the MIE concept-Double tapered channel file configuration can be used in the No 10 stainless steel file after nickel titanium instruments-SC(platinum), will be the best on the market for curved root canal preparation and single-tip filling.