5pc Carbide Disk Kitchen Sharpener. There's nothing worse than a dull knife especially in the kitchen. Use this simple sharpener to keep all your knives ready to use. 5 Tungsten carbide wheels make sharpening any knife easy. Simply set the sharpener on the counter and pull the blade upright through the wheels several times and it puts the perfect edge on your knife blade. Handy to use lightweight and easy to store. Limited lifetime warranty. 1 lb each.