Engineered specifically for the die, mold, and aerospace industries, our High-Hardness series cuts pre-hardened and hardened tool steels ranging from HRC 55 up to HRC 68 (including SKD11, NAK80, D2, and DC53). Formulated with nano-grade tungsten substrates and ultra-hard TiSiN/silicon-doped coatings, these cutters withstand extreme thermal loads during dry high-speed hard milling.