Folding pocket knives are a type of knife that can be folded and stored in a pocket or carried in a sheath. They are commonly used for outdoor activities such as camping, hunting, fishing, and hiking, as well as for everyday tasks such as opening boxes, cutting rope, and slicing food. A flipper is a small protrusion located on the spine of a folding knife that is used to open the blade with one hand. When closed, the flipper extends beyond the handle of the knife, allowing the user to easily flip it open using their thumb or index finger.