Material: Stainless Steel, Plastic Handle Two stages- coarse and fine-sharpening design Compact and easy to use design Non slip handle and base to ensure your safety and ease of use 2 sharpening modes to get a bright edge whatever the condition of your knife Not suitable for serrated edge knives, ceramic knives, or scissors using instruction: First, sharpener placed on the platform, holding a stable non-slip handle, and other handheld knife. Decided to use one or two steps according to the degree of tool blunt Step one, coarse grinding: used to repair badly damaged blade, suitable for a blunt tool. Knife into diamond grinding mouth, proper and uniform intensity of back and forth, pulling the blade observed blade circumstances, repeat this step 3-5 times. Tool grinding sharp six months before general use the kibble once, also according to the specific circumstances. Step two, finely ground: This is a necessary step to eliminate burrs on the knife-edge, the blade is polished smooth, bright. Use, please refer to the steps. Under normal circumstances, it is recommended that once a week or daily use to keep your blade sharp. Second, wipe with a damp cloth or rinse with water, then wipe dry. Size (L x W x H): 190mm x 50mm x 55mm