A knife sharpener is a tool designed to restore the edge of a dull knife blade. It typically features abrasive materials that grind against the blade to create a sharper edge. Knife sharpeners come in various forms, including manual sharpeners, electric sharpeners, and sharpening stones. Each type has its own method of use and effectiveness. Using a knife sharpener can enhance the performance of kitchen knives, making food preparation easier and safer. Regular sharpening helps maintain the quality of knives, which are essential tools in cooking. Properly sharpened knives reduce the risk of accidents and improve cutting efficiency.