Premium Material - The grinding position in the knife sharpener is made of tungsten steel, merino, high-hardness ceramics and other materials, which can be used for a long time. 3-Stage Manual Knife Sharpener - Sharpen dull knives easily and professionally. 3-stage sharpening process (coarse, medium, fine). Keeps your kitchen knives perfectly sharp. Ergonomic Design - The knife sharpener has a comfortable handle for maximum grip, suitable for both right- and left-handed users. Sturdy non-slip rubber base for ultimate stability and safety - any flat surface in your kitchen will do (no need to find a suitable clean surface, unlike knife sharpeners with suction cup designs). Easy to Use - Place the sharp position of the blade in the Knife Sharpener horizontally and gently pull the knife several times, after a few seconds, restore your dull knives (pull the knives down with some force, pull from its base to the tip, do not push back and forth). Suitable for Most Knives - Feel free to sharpen your kitchen knife, santoku knife, fruit knife, a dull knife or a new knife. Kitchen Knife Sharpener - Perfectly Sharp Knives Every Time. Bring Your Dull Knives Back to Their Best The knife sharpeners make sharpening easier. This ingenious 3-stage knife sharpener will restore your old, dull kitchen knives to their former 'just-bought' sharpness in no time. How to Use: Step 1: Place the knife sharpener on the table, one hand holds the non-slip handle, and the other firmly holds the knife. Step 2: Place the knife's tail into the sharpening edge, place the cutting edge of the blade in the knife sharpener horizontally. Step 3: Push the knives with some force, from its base to its tip, do not push back and forth. Caution: We do not recommend using the knife sharpener on specialty Japanese knives - this is due to the much narrower blade angles of these knives. May not be suitable for knives previously sharpened by long-term use of whetstones or steel. Knives sharpened by these methods may have developed a different or uneven blade angle over time. LRFR is committed to providing each customer with the highest possible quality of customer service.