The WÜSTHOF Two-Stage Hand-Held Knife Sharpener is safe and easy to use. Place the sharpener on a flat work surface and hold the E-Z grip handle with one hand and the knife handle with the other. Insert the knife blade fully into the slot at a 90-degree angle to the sharpener and pull back a few times to sharpen. After setting the knife's edge with the carbide side, use the unit's ceramic side to nicely finish the edge. This sharpener is designed to sharpen a knife at 14 degrees per side. Specifications: Handle Material: Synthetic Handle. *Note: This product cannot be sold to any person under the age of 18.