Application It can be used to polish chef knives, kitchen knives, bone cutters, fruit knives, scissors, or any other non-serrated blades, etc. to improve the sharpness of the knife.  Key Features ✔4-in-1 Function: Four different precision and material grinding slots allow it to adapt to more knives and even scissors. Tungsten steel, diamond, and ceramic can be distinguished into three gears: coarse, medium, and fine. The dedicated scissor groove is suitable for the daily sharpening of scissors, making the sharpening process more effective and labor-saving.  ✔Selected Material: It is mainly made of sturdy and durable food-grade stainless steel and ABS, allowing you to rest assured that it comes into contact with the knives. Selected tungsten steel, diamond, and ceramic sharpening stone allow you to quickly polish your knives and scissors.  ✔Easy to Use: The ergonomical round handle is both suitable for right- and left-handed users to hold comfortably with one hand. The large spacing allows you to easily align the knife with the grinding slot, and the one-way backward pull operation is simple and labor-saving.  ✔High Stability: The large PVC anti-slip pad at the bottom can increase the friction between the base and the table, making it stand more stable and less prone to shaking or falling during use, and also protecting the table from scratches. Details V-shaped Groove: The V-shaped groove is designed to keep the knife stable so that you can pull the blade through even pressure.  How to Use 1.Place the knife into the corresponding grinding hole, keeping it perpendicular to the countertop. 2.Hold the handle of the sharpener with one hand, and press it down with appropriate force with the other hand. Repeat pulling the knife back several times. 3.Grinding the blade tip: When the curved part of the blade passes through the blade groove, the handle should be slightly raised and the blade tip inserted into the blade groove. The larger the curvature of the blade, the more it is necessary to lift the handle. 4.Grinding scissors: Open the scissors and insert them into the grinding groove. Then clamp the polishing rod with the scissors blade. Press forward evenly and then pull back to clamp. Repeat this process several times. The scissors will immediately sharpen.  Slot Introduction The grinding slot #1: It is used for sharpening scissors. Open the scissors and insert them into the grinding slot. Then clamp the grinding rod with the scissor blade. Press them evenly forward and pull them back clamping. Repeat this process several times. The scissors will be instantly sharp. The grinding slot #2: Use this slot only when your knife is particularly dull. Pull the knife vertically backwards three times. Sharpening is carried out once every six months or only if necessary. The grinding slot #3: It is used for daily maintenance and grinding of knives, so that sharp knives are always available. It is recommended to use it once a week. The grinding slot #4: It is used to remove small burrs on the blade. Repeat the process two to three times in the same direction.  Specifications Color: Silver, Black Material: Food-grade Stainless Steel, ABS, PVC, Ceramic, Diamond, Tungsten Steel Surface Treatment: Wire Drawing Number of Items: 1 Gross Weight: 0.34kg/0.75lbs Net Weight: 0.29kg/0.64lbs Product Size: 22*6.6*7.8cm/8.66*2.6*3.07in Package Size: 22.7*6.5*8.8cm/8.93*2.56*3.46in  Package Included 1*Knife Sharpener