Hollow metal doors are sturdy doors made from thin sheets of metal, typically steel, that are filled with a core material for added strength and insulation. They are commonly used in commercial buildings, schools, and industrial facilities due to their durability and resistance to wear and tear. These doors can be customized with various finishes and sizes to fit different applications. They often come with features like fire ratings and security enhancements, making them suitable for high-traffic areas and locations requiring enhanced safety, such as hospitals and government buildings.