[Perfect for Lumber]The barricade brackets are designed to fit standard lumber for reinforcement and home security (lumber not included) and will fit any width and types of inward or outward opening doors. [Built-in Protection]Metal bracket is made of steel, coated to prevent rust, 4mm high-strength steel can absorb high kicking or pushing force without any plastic deformation. [Upgraded U-Shaped Design]The U-shaped design coupled with a reinforced and sturdy base can be installed on any exterior to prevent or delay entry, ensuring the safety of your home. [Wide Applications]This security bar bracket provides good security for types of interior or exterior doors, perfect for garages, basements, barns, sheds, warehouses, backyards, etc. It can also be used to secure shelves or use as a hook. [Quick and Easy Installation]It's easy to install this safety bar bracket. Simple drilling is required and there are tool holes for split rod bracket.