Security: The door hinge screws of the safety door have a unique design that can be deeply embedded in the opposite hinge page and door frame, which not only protects your door but also prevents thieves from entering your home. Durable material: The door hinge safety screw pin has a cross head and is made of high-quality hardened galvanized steel, which is easy to manually drive and not easy to rust after long-term use. Widely used: Anti disassembly screws can be used for residential, commercial, office, school classroom doors, internal and external doors, archives, and safety door hinges are suitable for louvers, door hinges, wooden doors, etc. Package includes: 10 hinge safety screws. Size information: Approximately 1.7 inches/43 millimeters in length. Note: Not all door hinges are accurately constructed. Please check the size of your door hinges