By DH – Junior scissors Material by #440A Taiwanese forged stainless steel. HRC 57 ~ 58 degrees. Sharpness same as DH collection, blade cutting life reaches 50% of DH scissors, for Beauty schools, or Junior Stylists. The Rockwell hardness factor indicates the hardness of the steel and the price level of your scissors. The higher the factor, the longer the useful life of your scissors will be. 440A - of all the 440 stainless steels, it has the least amount of carbon, but is most stain-resistant.