Material: 440C is internationally recognized as one of the high-end hair scissors material with the perfect combination of high hardness and high toughness.440C hair scissors is very sharp and has excellent edge sharpness retention. Tips:The hardness of scissors is not the harder the better.The greater the hardness of the scissors,the lower the toughness.The blade of the scissors is very thin.If the toughness is small,the cutting edge collapses easily.