Door handles are mechanical devices used to open and close doors. They come in various shapes, sizes, and materials, including metal, plastic, and wood. The most common types are lever handles and knob handles, each designed to provide a secure grip for users. Door handles can be found in homes, offices, and public buildings, serving both functional and aesthetic purposes. In addition to their basic function, door handles can also enhance security. Many modern door handles are equipped with locking mechanisms, which help protect against unauthorized access. Some handles are designed for specific types of doors, such as sliding doors or French doors, ensuring they operate smoothly and effectively.