A pneumatic nailer is a power tool that uses compressed air to drive nails into various materials, such as wood or drywall. It is commonly used in construction and woodworking projects for its speed and efficiency. Pneumatic nailers come in different types, including framing nailers, finish nailers, and brad nailers, each designed for specific tasks. These tools require an air compressor to function, which provides the necessary pressure to operate the nailer. Users can quickly complete tasks like framing, roofing, or installing trim, making pneumatic nailers a popular choice among professionals and DIY enthusiasts alike.