- High quality material: The door security lock is made from a solid zinc alloy with a polished finish to complement your decor and provide durable performance. - Upgraded safety design: Metal door security lock with 4 screws that withstands 800 lbs of force, about 12 times stronger than a normal bolt against forced entry. - Easy installation: Use the included screws to mount on the door frame. Quick and simple installation that most homeowners can complete in minutes. - Easy to operate: Place the finger on the lock safeguard and the thumb on the bottom, slide the lock along with the door toward the hinges away from the base plate, then pull outward. No tools required to open, just a little practice. This door protection helps prevent break-ins while remaining easy to open in an emergency. - Practical uses: Ideal for apartments, rental homes, and entry doors where extra security is desired; useful when traveling or on vacation to secure doors while away; suitable for households with children or elderly residents needing added peace of mind.