A pocket knife is a small, foldable knife that can easily fit in a pocket. It typically features one or more blades that can be opened and closed, making it convenient for various tasks. Pocket knives are often used for cutting, slicing, and other everyday activities, such as opening packages or preparing food. Many pocket knives also include additional tools, such as screwdrivers, can openers, or scissors, making them versatile multi-tools. They come in various designs and sizes, with some being simple and others more complex. Popular brands include Victorinox and Gerber, known for their quality and durability.