General description This is a double-sided grindstone that can be used for both rough and fine grinding on its front and back surfaces. It is ideal for small kitchen spaces due to its compact size, making it easy to store and use at home. The middle wheels are designed for scratch erasing, sanding, and polishing, while the finishing wheels are perfect for achieving a polished edge. Technical specifications Whetstone size: 18.6 cm x 6.7 cm x 2.8 cm Material: White Alundum (a hard ore with excellent durability) Grit: 1000/4000 Installation Immerse the whetstone in water for 5 minutes before use. Place it on a stable surface. Usage Hold the knife at an angle of 10 to 20 degrees against the whetstone. Clean the blade and polish it on the whetstone. After polishing, wipe the grindstone with a membrane, rinse with water, and dry. Wash the surface of the grindstone with a soft brush and dry. Other information Includes 1 x whetstone grit 1000/4000. Features a non-slip silicone holder to