A door handle is a mechanical device used to open or close a door. It is typically attached to the door and can be operated by hand. Door handles come in various shapes, sizes, and materials, including metal, plastic, and wood. They can be found on residential and commercial doors, providing both functionality and aesthetic appeal. There are different types of door handles, such as lever handles, knob handles, and pull handles. Some door handles also include locking mechanisms for added security. Proper installation and maintenance of door handles are essential for ensuring they function smoothly and last longer.