Nitrogen-infused steel maintains its ultra-sharp cutting edge longer and provides superior corrosion resistance Specially designed with a slot for sharpening blade edges and another for honing them, the block that houses this chef-caliber knife set is a breakthrough in precision blade maintenance Block features 2 built-in knife maintenance slots: one to sharpen blades to a fine edge the other to hone blades to maintain their integrity Precision-tapered ground blades narrow gradually to an extremely sharp, fine edge Block features 2 built-in knife maintenance slots: one to sharpen blades to a fine edge the other to hone blades to maintain their integrity Forged, durable, extra-wide safety bolster for perfect stability and control Limited Lifetime Warranty