New Exclusive at William Sonoma - Shun Classic Dual-Density 7" Utility Knife - The unique combination of low- and high-frequency serrations guarantees unsurpassed performance. Low-frequency serrations help minimize resistance between blade and cutting board. High-frequency serrations reduce tearing when cutting soft-skinned foods (like tomatoes) or slicing through hard crusts. Durable PakkaWood handle resists moisture and has a D shape, to sit comfortably in the hand.