Cooper Lighting DF Series is a drywall mounting frame kit for recessed luminaire installation. It can be used for both standard recessed luminaire installation with nails or screws, and for installation with wire hangers. The frame kit is designed to overlap the drywall, providing a secure and stable mounting surface for the fixture. It is compatible with a wide range of fixture widths, and can be assembled in various configurations, including individual unit assembly, individual row mount with center mullion assembly, and uninterrupted continuous row assembly.