A nail gun is a power tool used to drive nails into wood or other materials quickly and efficiently. It operates using compressed air, electricity, or a combustion engine, allowing users to complete tasks like framing, roofing, and finishing much faster than with a hammer. Nail guns come in various types, including framing nailers, finish nailers, and brad nailers, each designed for specific applications. Safety is crucial when using a nail gun, as improper handling can lead to serious injuries. Most models feature safety mechanisms, such as a trigger lock and a contact tip, to prevent accidental firing. Proper training and protective gear, like goggles, are recommended for safe operation.