Hot work tools In manufacture of forged parts often appears the problem of cracking, even when surface engineering is performed properly. Toolox reduces this risk because it is not surface engineered, yet it has the same properties as those steels that are. Furthermore, when forging it is often necessary to compromise on steel hardness in order to attain high level of crack resistance. However, Toolox eliminates this dilemma because it guarantees both: high hardness and crack resistance through high toughness. Optimal combination of hardness and toughness make Toolox the best possible choice for hot work tools.