Increased sense of security: Live alone and feel insecure at night? Worried about a child being home alone? Concerned about safety while traveling? This anti-theft door blocker helps prevent unauthorized entry, providing peace of mind while sleeping. It acts as an added layer of security for your door. High-quality materials: Constructed from durable zinc alloy, this door blocker offers high hardness, strong tensile strength, and long-lasting durability. Resistant to damage and built to withstand force. Super resistance: Features a high-strength metal structure with an integrated design that uses physical principles to transfer force to the ground, enhancing door stability and security. Portable and widely applicable: Compact and lightweight design makes it easy to carry. Suitable for most inward-opening doors with a door gap height between 0.2 and 2 inches. No harm and easy to install: Installs in seconds without tools or permanent modifications. Removes quickly when not needed. The contact surface with the door is covered with soft sponge, and the floor contact is made of plastic, helping prevent scratches on both floor and door.