Review on Double Cut Honing Steel by ZWILLING J.A. Henckels by Alan Sawyer

The hardness of the steel should match the hardness of the knife you are using it on. If your knife scores above 56 on the Rockwell scale, you need a steel like this. If you like really good kitchen knives when looking at this twin steel, check out the Kramer twin line of knives. These knives are beautiful and have great steel and are a big improvement on the standard Wüsthof line. The steel is harder than 58/59 and requires a new sharpening steel, but not as hard (or as brittle and difficult to sharpen) as high quality Japanese knives.