3 in 1 knife sharpener, stainless steel, for sharpening knives and shears , non-slip handle, ergonomic design, ideal for home and professional use Quick sharpening, with tungsten steel technology, the traditional side shifts into double sided sharpening for significantly improving sharpening speed. Unique corner design makes milled cutlery sharper and durable. After the knife is teethed, you will feel comfortable putting the cutting board on meat, fruits and vegetables smoothly. Our product is simple and easy to use; no water and electricity required, modern family kitchen necessities must have. [Chipping Knives] : Place the sharpener on the platform, grab the left hand with the sharpener handle, place the knife vertically into the V-groove, with a convenient pull-back force (don't push the knife forward). As the direction of the arrow for several times until the knife is sharpened, then place the knife vertically to the V-shaped "Fine Grinding" to pull the knife as above to achieve the optimal sharpness of the knife. If there are gaps on the knife or gills too thick, please fix it before. Use please clean the oil on the knife before sharpening it to avoid affecting the effect of the sharpener. Not suitable for sharpening ceramic knives or shears Note: Please check the position or angle of the knife in the V-shaped groove and grinding the knife again if the knife is not sharp enough.