Topic: Whetstone

John C. Dvorak provides a "Tip of the Day" recommending the Zwilling Twin Sharp knife sharpener, a tool he has used for 30 years. He cautions that while it is effective for standard steel blades, it should never be used on high-end Japanese knives, which require traditional whetstones and specific sharpening rituals. The segment concludes with a promise of future tips focused on essential kitchen knives.