A piano hinge is a long, continuous hinge that runs the entire length of a door or lid. It is commonly used in applications where a strong and stable connection is needed, such as in pianos, hence the name. This type of hinge allows for smooth movement and can support heavy weights, making it ideal for various furniture and cabinetry. Piano hinges are typically made from materials like stainless steel or brass, providing durability and resistance to wear. They can be found in many settings, including musical instruments, toolboxes, and storage cabinets, where they facilitate easy access and functionality.