3-STAGE KNIFE SHARPENER:\r\n1. COARSE:  First of all, the tungsten steel step is the starting point for grinding normal steel knives, making them recover straight shape again. \r\n2. CRUDE: Diamond grinder will make the knife sharp. \r\n3. FINE: The final step of the sharpening process. Honing the knives with ceramic stone to remove burrs and polish the blade.\r\n\r\nHOW TO USE IT?\r\n1. Insert the blade into the slot at a vertical angle to the sharpener.\r\n2. Place the blade in tungsten steel cutting heads.\r\n3. Pull the knife straight back towards you(2-3 times) while applying light pressure.\r\n4. Place blade in diamond cutting heads.\r\n5. Pull the knife straight back towards you(4-5 times) while applying light pressure.\r\n6. Place blade in ceramic fine smoothing rods.\r\n7. Pull the knife straight back towards you(5-6 times) while applying heavy pressure.\r\n8. If the blade is still dull, repeat these steps until the blade is sharp. \r\n\r\nCOMMON SHARPENING ANGLES\r\n^Fillet Knives =16°\r\n^Kitchen Knives (Asian) =16°\r\n^Kitchen Knives (American/Euro) =20°\r\n^Pocket Knives=20°\r\n^Hunting Knives=22°\r\n^Tactical Knives=22°\r\n\r\nNOTE: \r\n1. Please check the position or angle of the knife into the V-groove and grind the knife again if the knife is not grinding sharp enough. \r\n2. If there are gaps on the knife or gills too thick, please fix that first. Please clean the oil on the knife before grinding so as to avoid affecting the sharpener effect. Not suitable for grinding ceramic knives or scissors.\r\n3. Always clear the sharpener after use. Clean with a damp cloth or mild brush, wipe dry. \r\n4. Please put the knife sharpener and knife beyond the reach of children to avoid any accidents.\r\n5. Always rest your sharpener on a stur