The invention is directed to skin care products in oil, cream, emulsion, gel, liquid and stick form for dry and scaling skin. The chamfering insert has a cutting edge, first and second opposite insert abutment surfaces, each of which extends perpendicularly to the insert axis, and an insert anti-rotation surface which extends parallel to the insert axis. The transmitted data is processed in the control unit and displayed there or is transmitted to a separate device for display andor analysis.