Kenchii Beauty Shears come in several levels. The Evolution 6.0 shear is made with Level 3 Material. Kenchii level 3 shears are for professional who demand superior quality and performance from their tools. A premium Japanese stainless steel with an excellent corrosion resistance. Molybdenum and cobalt alloy increases toughness, strength, wear resistance, and corrosion resistance. After heat treatment, this metal is capable of attaining extraordinary hardness and wear resistance. Rockwell: 58--60