Nail Cutter Textured Handle Lap Joint, Single Spring Available Sizes. 10 cm, 11 cm, 12 cm Details. Implements produced for professional usage are made of Japanese stainless steel J/2 – 420, HRC (hardness) 52 – 55. Implements produced for personal usage are made of superior quality stainless steel 410, HRC (hardness) 45 – 48.