Very suitable for 2x4 wood - The door barrier bracket is designed to fit standard 2x4 wood for door reinforcement and home safety (wood is not included), and can be used for doors of any width as well as all types of inner or outer doors. Built in protection - Each door metal bracket is made of high-quality steel, coated with powder to prevent rust. 4mm high-strength steel can absorb high kick or thrust without any plastic deformation. Upgraded U-shaped design with reinforced and sturdy base, can be installed on any external door to prevent or delay entry, ensuring the safety of your home. Widely Used - This door safety pole bracket provides excellent safety for all types of inner or outer doors, making it ideal for garages, basements, barns, sheds, warehouses, backyards, and more. It can also be used to secure shelves or as a hook. Quick and easy installation - your home will be safer in just a few minutes. Simple drilling is required, and each open rod bracket has a tool hole for easy tool access.