Anti-rust material: Thegate bar holder is made of iron with industrial grade black paint, and the metal bracket is made by electroplating process, with smooth surface, good hand feeling, rust resistance and durability. Thickened strength steel: 3.5mm thickened high-strength iron metal u bracket design can withstand high-strength thrust or kicking force, and the barricade door bracket can withstand 700 pounds of starting force, giving you a strong sense of security. Package includes: You will receive 4 u-shaped bar security holder bracket with a size of 3.8x2.7x1.5inch(9.6x7x4cm) and a width of 1.5inch(4cm) and 12 metal screws. Easy to install: After you've found a suitable location, screw down the door frame or door barricade bracket on the wall. Each small round hole on the long side corresponds to 3 screws, and the large round hole on the short side is a hole for easy installation. Wide application: Door barrier bracket is suitable for 24 wood and can also be used to fix the front door, basement door, garage door, warehouse door, backyard door and other types of doors of the house to protect your personal safety and property safety.