HOW TO SHARP YOUR KNIFE? 1. No sharpening oil is needed ,just soak the whetstone in water for 10-15 mins before using, then the knife stone can fully absorb moisture. 2. Fix the whetstone on the non-slip silicone base so that it doesn't slip to hurt you and your knife during work. 3. First use # 1000 grinding 10-15 minutes for rough grinding, then use #6000 grinding 10-15minutes for fine grinding. 4.The knife sharpening angle guide allows you to maintain the correct angle and safely apply consistent pressure while sharpening the blade. 5. According to the different knives to choose your sharpening angle.17 degrees: Razor, Sushi knife, chef knife and kitchen knife.20 degrees: Pocket knife, fruit knife and boning knife. 25 degrees: Field knife.30 degrees: Bayonet or field knife.40 degrees: Survival knife. 6. After finishing sharpening the knife, wiped the knife with a wet cloth or rinse it with water, and rinse the sharpening stone directly with water and put it in the air to dry.