Classic
For home use only, manual sharpening.
Smart
For entry level professional and salon use, manual sharpening, fine polishing.
Expert
Professional, high level professional, manual sharpening under microscope, finest polishing. Very sharp, not recommend for entry level techs.
Exclusive
Exclusive design, for high level professional, manual sharpening under microscope finest polishing. Very sharp, not recommend for entry level techs.