A Jack Knife (also known as a Survival Knife) is a versatile tool designed for outdoor survival situations. Typically featuring a folding blade, a jack knife can serve multiple functions, such as cutting, slicing, prying, and opening. In survival scenarios, it is an essential tool for tasks like preparing food, building shelters, or performing first aid. Many jack knives also include additional tools like a can opener, screwdriver, or even a fish scaler, making them ideal for camping, hiking, or emergency preparedness.