Description: 【Perfect Fit for 2x4 Lumber】: The door barrier bracket is designed to accommodate standard 2x4 lumber for door reinforcement and home security (lumber not included). It can be used for doors of any width and all types of inward or outward opening doors. 【Built in Protection】: Each door metal bracket is made of high quality carbon steel with a rust resistant surface treatment. The high strength steel can absorb high kick or push forces without any deformation. 【Upgraded U Shape】: The U Shape, coupled with a reinforced sturdy base, can be installed on any exterior door to prevent or delay entry, ensuring your home's safety. 【Wide Application】: This door security bar bracket provides good security for all types of interior or exterior doors. It is ideal for garages, basements, barns, sheds, warehouses, backyards, etc. It can also be used to secure shelves or as a hook. 【Quick and Easy Installation】: In just a few minutes, your home be more secure. Simple drilling is required, and each opening bar bracket has tool holes for easy tool access. Specification: Material: Carbon Steel Size: approx. 10.5cmx4cm/4.13inchx1.57inch Package Includes: 2 Door Barrier Brackets 12 Screws Note: Please allow slightly errors due to manual measurement and different monitors.