Beyond their functional duties of making a door operational, doorknobs, hinges, and similar hardware components can add significantly to a door's beauty and style. In this section of HomeTips, you will find information that will help you buy appropriate door hardware, as well as help you with do-it-yourself installation and repairs. In addition, you will find expert tips for buying glass for both entry doors and interior doors—from high-efficiency energy glazing to decorative leaded glass. For more about window glass, see Window Glazing.