Rediframe Prefinished, Fire-Rated Steel Door Frames in Fixed- and Adjustable-Throat Styles. Adds Security, Safety, and Style to any doorway. Use with steel, aluminum, S56 Colonial Steel or custom wood casing for decorator look. Slimfold Prefinished Steel Bifold Doors and Mirror Wardrobe Doors. Steel Bifolds come in Ivory or Bright White in six modern styles. Mirror doors come in bifold, slider, and overlay styles.