A crowbar is a simple hand tool made of metal, typically featuring a long, straight bar with a curved end. It is primarily used for prying, lifting, and removing nails or other fasteners. The design allows for significant leverage, making it effective for tasks like breaking apart wooden structures or opening crates. Crowbars come in various sizes and styles, including the popular pry bar and wrecking bar. They are commonly used in construction, demolition, and woodworking. Due to their strength and versatility, crowbars are essential tools for both professionals and DIY enthusiasts.