The best meals begin with the perfect tools! This J.A. Henckels 12 Piece Block Set has everything you need for the best meals anytime! The Friodur blade is further refined with a special ice-hardening process: Heating to 1800 degrees F to harden the steel, Quenching - cooling down to room temperature quickly, Freezing to -94 degrees F to enhance the corrosion resistance, Double tempering to just below -480 degrees F to improve toughness