This product is the best sharpener you could have. Whether you're slicing meat, dicing vegetables or carving the Sunday roast, a sharp blade makes cutting effortless. It's able to restore a super sharp cutting edge to blunt knife blades that have dulled with use. With sturdy metal construction, this Manual Knife Sharpener uses tungsten carbide technology to extend the life of almost any knife, while working on virtually any knife including expensive hardened steel knives and even serrated blades (like bread knives and hunting knives), making it unlike any knife sharpener, steel or sharpening stone you've ever used. The suction cup base attaches securely to any smooth surface or worktop.