The Victorinox 4.3393.1 Sharpening Stone is the perfect replacement for the 40097 system, designed to restore and maintain the razor-sharp edge of professional kitchen knives. Crafted from India-type aluminum oxide, this stone offers superior durability and consistent grit, ensuring a precise, controlled sharpening experience every time. Its flat, rectangular profile (11.5" x 2.5" x 0.5") provides ample surface area for even honing across the full length of the blade, making it ideal for high-volume kitchens where efficiency and precision are paramount. Whether you're maintaining a standard chef's knife or a specialized slicing blade, this stone delivers the fine-grit abrasion needed to maintain performance without over-sharpening, extending the life of your blades while keeping them at peak cutting efficiency. Professional chefs and restaurant owners trust Victorinox for its reliability, and this replacement stone continues that legacy with a neutral-toned, professional finish that fits seamlessly into any commercial kitchen workflow.