Double side combination stone and premium quality material: the knife sharpener is perfect for kitchen, outdoor and DIY projects; The low grit side is for tough sharpening and the other high grit side is for fine grinding. We choose very professional and high quality white corundum material to guarantee the product is heat-resistant, wear resistant and durable Knife sharpening guide is included which teach you how to use the in detail steps. Suitable for most knives, such as scissor, pocket knives, hacking knives, fruit knives and other kitchen knives. But serrated knives serrated blade knives cannot use this kind oil stone If you don't know how to sharpen a knife at right angle, stone angle will be a good choice. A cloth or towel is included as a gift which you can use it clean your knives Slip-resistant rubber bottom make your sharpening stone easy to handle and stays in place during use. Color: Blue+White Sharpening: 1000/4000 Grit Size: 18*6*3cm Double-Side Knife Sharpening Stone The rough grit side is for coarse grinding and the perfect grit side is for fine grinding. The whetstone is made from premium quality and professional white corundum material. How to Use: 1. Soak the sharpening stone into Water for 5 minutes, then put it on a steady surface such as a table or a desk. 2. First use the one side for fine grinding in 10~30 degree angle, push the knife out with a little force, and then gently retracted. This process takes about 15 minutes. 3.Then use the other side to polish your knife, don't force too much. This process takes about 10 minutes. 4. After sharpening the knife, clean the knife with wet cloth or Water, then dry it. 5. Use a soft brush to clean the oil sharpening stone, then placed in a ventilated place out to dry. Package Contents: 1 x Sharpening stone 1 x base holder 1 x Knife holder Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.