... High-speed cutting tools, carbide broaches, tungsten steel broaches, broach high hardness(stainless/wear-resistant/high precis)This is super high hardness super mirror finish stainless high speed steel ... ISO K25, can replace machining of materials like M42, ASP60, MPM, HSSCo10 etc, and can get ... to ISO K10.SKH4C: (a kind of high speed steel, which does not rust at all.)(Hardening treatment ...