Wusthof Diamond Sharpener, Fine, Oval, 26 cm (10-inch) - 4483 Carbon Steel so maybe they're on to

so maybe they're on to something here

- High impact resistant black handle made of synthetic material

We recommend the fine ceramic hone listed below for everyday maintenance

Naniwa Diamond Pro 400 Grit Japanese Sharpening Stone

Wusthof Diamond Sharpener, Fine, Oval, 26 cm (10-inch) - 4483 Carbon Steel so maybe they're on toExcellent value in a diamond sharpener. If you want a diamond sharpener, in my opinion this is the way to go. It's coated with industrial diamonds in a "fine" grade, so you can really get a nice edge without risk of damage from too agressive cutting with a "coarse" version, and the long length and oval shape means you get excellent control and consistency with maximum efficiency (the oval design helps with additional surface area). Note: this does not