Warning: A smooth steel is not a steel which has been passed on a grinding wheel or on a sanding machine !
- Warning: A smooth steel is not a steel which has been produced from a steel rod or a screwdriver handle!
- The raw material used for the steel shaft is a carbon-chrome vanadium steel
- The steels are covered on the surface with a thin layer of nickel followed by a hard-chrome layer.
- ISLER steels are hardened to 65 HRc (Rockwell hardness), which is considerably harder than the Rockwell hardness of the knife blades.