Multi-Purpose: Re-sharpens scissors, knives, cleavers, choppers and mezzalunas. Not suitable for serrated or scalloped-edges knives. To Sharpen Knives: With the back edge of the knife on a flat surface, simply draw the sharpener across the cutting edge. After 5-6 passes, the tungsten carbide sharpening heads restore a really sharp edge right up to the tip, even on the bluntest edges. To Sharpen Left and Right-Handed Scissors: Simply push the blades through the tungsten carbide sharpening head. Repeat up to 10 times, to get edges sharp enough to cleanly cut tissue paper. Easy to Use: With a comfortable, ergonomic handle to protect user’s hand. Strength and Durability: tungsten carbide sharpening heads, a very hard and effective sharpening material widely used in the industry., Weight: 0.1984160358 pounds, Manufacturer: Multi-Sharp