Casement windows are hinged at the side and swing open like a door, rather than sliding up and down like a double-hung window. The casement handle is used to operate the window, and is typically a lever or crank that is turned to open or close the window.

Most casement handles are made of metal, such as brass or zinc, and come in a range of finishes to match the décor of the room. Some handles may also have a locking mechanism to provide additional security.