Sharpen both your Standard knives and your Asian style knives with the Wusthof 4 stage knife sharpener. The standard sharpener uses carbide blades set at 28 degrees or 14 degrees per side to sharpener your standard kitchen knives. Stage 2 of the standard side uses ceramic rods to hone a fine edge on your blade. Simply slide the cover over to Asian knives to sharpen your Asian knives to a 20 degree angle or 10 degrees per side. The V-shaped cutting head with two crossed carbide blades puts a quick edge on knives. Stage 2 uses ceramic rods to hone the fine edge of your Santoku or Nakiri knives. Simply place the gadget 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 down and back three or four times to sharpen. After setting the knife s edge with the carbide side use the unit s ceramic side to nicely finish the edge. The four-stage knife sharpener measures 9 by 3 by 1-1/2-inches.