Quick Mount Doors and Sub-Frames by Securall® are ready-to-install into pre-existing door openings. The Quick Mount door and sub-frame can be used to quickly replace an old door or to change the handing/swinging of an opening. Quick Mount Doors come with all hardware pre-installed. We use high quality Grade 2 hardware, and the door is available in a variety of configurations. Quick Mount Doors and Sub-Frames are designed to be the ideal product for the replacement door market and can be used to quickly secure any pre-existing opening. Quick Mount doors come in two thicknesses of steel, 18 gauge or 16 gauge, while, all sub-frames are 14 gauge steel.