Rapala Two-Stage Knife Sharpeners feature two-stage sharpening and an ergonomic design. One side has coarse ceramic rods for cleaning up damaged and dull blades, the other side has fine ceramic rods for putting a fine razor sharp edge on the knife. Just a few strokes through these sharpeners will get you cutting again. Perfect for on the boat, in the camp, or at home. You'll never have to struggle with a dull knife again.