These hinges are made from durable and robust steel material. Steel provides excellent strength, stability, and resistance to wear and tear, ensuring long-lasting performance., With a size of 3" (75mm), these hinges are suitable for doors of various thicknesses. The dimensions provide a proper fit and support for the weight of the door., Butt hinges feature a versatile design that makes them suitable for a wide range of door installations. They can be used for both interior and exterior doors.