KN-18mm. Nail clippers with a working cloth length of -18 mm. Designed for cutting nails of absolutely any thickness! Manicure nippers are made of stainless steel grade 40X13, which is used for the manufacture of surgical instruments. Vacuum heat treatment provides high hardness of steel, 48-50 HRC, which in combination with high-quality sharpening allows the use of cutting pliers for a long time without re-sharpening. Sharpening of all nail clippers is done manually by highly skilled craftsmen on a circle with diamond coating.