Made from ultra-hard alumina ceramic material, this 2" x 8" Spyderco's fine-grit benchstone is used as a traditional sharpening stone but does not require oil or water. Its broad, flat surface is ideal for sharpening woodworking tools and all types of knives and can be easily cleaned with a household cleaner, a scouring pad, and water. It comes in a light blue polymer case with non-skid rubber feet.
Made in USA.
See in the official website: https://www.spyderco.com/catalog/details/302F/80