Slightly smaller than the Chef's Knife, our 5-1/2-inch/ 14cm Santoku Knife is designed for those who want the virtues of a Chef’s Knife but seek a finer control over its use. People often ask why the ViCera 14cm blade is called a santoku even though it doesn't have the common santoku shape that is generally seen in the western world. Originally, there were many shapes for the santoku knife. It was the size, usage and construction that made it a santoku. Therefore, as far as ViCera is concerned, our knives have been named Chef's, Santoku, Utility and Paring according to size and corresponding usage. ViCeraTM ceramic knives are made of an advanced, high-tech ceramic called zirconium oxide (also known as zirconia). Zirconium oxide is extremely hard and wear resistant, rating 8.5 on the Mohs scale – surpassing stainless steel (5-6 Mohs) and approaching the hardness of diamond (10 Mohs). The Mohs scale, developed by mineralogist Friedrich Mohs, is the universally accepted standard for measuring the hardness of minerals. The primary difference between ViCeraTM and other ceramic knife manufacturers is the size of the zirconium oxide particles in the finished blade. Using advanced technology, the zirconium oxide particles in ViCeraTM blades are broken down to one fifth of their original size. They are then pressed using 500 tons of pressure (compared to the 200 tons used by other ceramic producers). The end result is a stronger, denser blade with substantially longer edge retention. When you pick up a ViCeraTM ceramic knife, you are holding a perfect balance of new technology and old-world craftsmanship. A brilliant, white blade that is as light as a feather and tougher than nails.