Window hinges are mechanical devices that allow windows to open and close smoothly. They are typically made of metal or durable plastic and come in various styles, such as butt hinges, piano hinges, and friction hinges. The choice of hinge affects how far the window can open and how securely it stays in place when closed. These hinges are essential for the functionality of windows, providing support and stability. Proper installation and maintenance of window hinges can enhance energy efficiency and improve the overall lifespan of the window. Regular checks can prevent issues like misalignment or difficulty in opening and closing.