Whetstone/Sharpening Stone/Knife Sharpener Whetstones T0911W are known for excellent sharpening performance. The firm but still porous structure of the stone continuously releases small particles during the sharpening process. This powder in combination with water is what sharpens the knife. Product Feature Two sides whetstone finely hones knife edges Hard enough for quick, easy and durable work Can be used immediately after wetting Suitable for woodworking and Japanese knives Using Instruction Soak the stone in lukewarm water for a few minutes. As soon as the air bubbles stop rising the stone is ready for use. Please continue to apply water also during the sharpening. Place the stone on a non-slip workshop and make certain that the surface is flat. Start by using the coarse grit(brown side) of the stone. Move the blade back and forth over the stone at an angle of 10 - 30 ° by using gentle pressure. Start at the tip of the blade, continue to the middle, and finish at the end of the blade. After a while you will notice a small burr at the edge. Then move to the fine grit (blue side) of the stone and repeat the process until sufficiently sharp. Please rise the stone and clean off the grinding residues. Please also clean your knife with hot water. Tips:1. Suitable for use with water or oil. 2. The 10 to 30 degrees depending on the application:10°for filet knives, 23°for kitchen or pocket knives, and 30°for cleavers 3. Use the entire surface of the stone when sharpening. This will ensure even wear of the stone over time. Caution: Please be extremely cautious during the sharpening process to prevent any injuries.