- Upgrade Security Design: 3' Stop metal construction home security door lock with 4 screws designed to withstand 800 lbs of force, 12 times stronger than a normal deadbolt against kicking in. Each latch includes 8 screws (4 long and 4 short) to suit your needs. This reinforcement lock guards your home and is a solid choice for home security, and it can be a thoughtful gift for your family. - Easy to Install: Mount on the door frame with a power screwdriver and drill. Complete the reinforcement installation in less than 5 minutes and it fits inward swinging doors. Comes with an installation manual; contact us if you have any issues during installation and we will help you. - Operation and Access: Place index finger on top of the door lock and the thumb on the bottom, slide the lock away from the base plate along the door toward the hinges, then pull outward. No tools are required to open, just a little practice. This door guard helps deter break-ins but remains easy to open in an emergency. - Home Security and Childproofing: This childproof door lock adds extra security for toddlers when you are away. The spring-loaded design prevents children from opening the door to unknown people. It provides protection for your children when you are not with them and also helps the elderly or women feel safe at home alone. - Ideal use scenarios: Front or back entry doors in family homes with children; apartments or rental properties requiring extra security; interior doors where childproofing and added protection are desired.