Increased sense of security: Live alone and feel insecure at night? The child is at home alone, worrying about the childs safety? Are you on a business trip and worry about security while sleeping? With this anti-theft door blocker, you no longer have to worry about being broken in while sleeping. Its like you hired a personal bodyguard. High-quality Materials: This anti-theft door blocker is made of high-quality zinc alloy, with high hardness, high tensile strength, sturdiness and durability, and not easy to damage. Super Resistance: The high-strength metal structure, integrally formed, uses physical principles to guide the thrust to the ground, thereby supporting the door more firmly. Portable & Widely Applicable: This door security lock is compact and exquisite, very convenient to carry. Suitable for most doors(The height of the door gap is between 0.2-2 inches) that open inward. No Harm and Easy to Install: The installation can be completed in just a few seconds, and the disassembly is also fast. The contact surface between the door stopper and the door is soft sponge, and the contact surface with the floor is plastic to ensure that the door and the floor will not be scratched.