Feature: 1. Sturdy and Practical: This sharpening stone does not contain iron. Very strong and unbreakable, stone will have a strong impact on the knife when sharpening and very practical. 2. Using Stone with Water: The sharpening stone is designed to be used with water, no need to soak it before use, just sprinkle it with water on the exterior. 3. Boron Carbide Material: This 800 grit sharpening stone is made of boron carbide material, self sharpening, safe while giving you a good experience. 4. Rubber Base: The sharpening stone is very easy to assemble and comes with a fixed non slip rubber base that won't slip and is safe to use. 5. Multi Application: The sharpening stone is perfect for use and is suitable for chef's knives, hunting knives, pocket knives, etc. Specification: Item Type: Sharpening Stone Material: Boron carbide, rubber Specification: 800Grit Size (Without Base): Approx. 200 x 50 x 12mm / 7.87 x 1.97 x 0.47in . Package List: 1 x Sharpening Stone1 x Rubber Base Note: 1. This sharpening stone is intended to be used with water, not with oil.2. Manual measurement may have 0‑1cm error. Please make sure you don't mind before ordering.