Heavy-duty carbon steel door barricade brackets with industrial forging process ensure maximum security against unauthorized entry. Upgraded U-design reinforced base fits standard 2x4 lumber, suitable for installation on exterior doors, barns, garages, and sheds. Features durable black coating for rust prevention in both indoor and outdoor environments. Pre-drilled tooling holes enable quick installation with simple drilling required complete setup within minutes. Universal compatibility with inswing/outswing doors measuring 14cm (5.5") in size, ideal for residential and commercial security applications. Package includes 2 metal brackets (color: black) with 1-3cm measurement tolerance. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.