Victorinox Swiss Army 4.3393.1 is a replacement sharpening stone designed for precision and durability. Made from fine aluminum oxide, this single grit stone ensures a sharp, polished edge for your knives. It is specifically compatible with the Victorinox honing system model 4.3393.2, making it an essential accessory for maintaining your cutting tools. Ideal for both professional chefs and home cooks, this sharpening stone enhances the longevity and performance of your knives, ensuring optimal cutting efficiency.