A pull-through knife sharpener is a simple and convenient tool that can be used to keep your knives sharp. It consists of a series of abrasive slots that the knife blade is pulled through to remove metal and create a sharp edge.
Pull-through knife sharpeners are relatively inexpensive and easy to use, making them a popular choice for home cooks and professionals alike. They are also portable, so you can take them with you when you travel or go camping.