[Upgrade Security Design]: 3Inch Stop metal construction home security door lock with 4 screws designed to withstand 800Ibs of force, 12 times stronger than a normal deadbolt to against being kicked in. We equipped each door lock latch with 8 screws, including 4 long and 4 short, which you can choose according to your needs. safety door lock guard your home safe. This reinforcement lock is a good choice for home security. And the for your families. [Easy to Install]: Use a power screwdriver and drill to mount security door lock on your door frame, finish DIY this door lock reinforcement installation in less than 5 minutes and you reap the safety of the whole family. Easy to match any inward swinging door. safety door lock guard your home security as a door . [Easy to Use]: Place index finger on top of door lock security and thumb on bottom and slide lock away from the base plate along with the the direction of the hinges then pull outward. No tools are required to open, just a little practice. This door guard prevents breaking in but is easy to open in case of emergency. You much more confident in your doors being to sustain any sort of forced entry. [Home Security & Childproofing]: child proof door lock adds extra security measures for toddlers while you aways on business. This door reinforcement lock has a spring-loaded design to prevent children from opening the door to unknown people. This lock for door inside can provide protection for your children when you are not with them, it also makes the elderly or ladies feel when they are alone. Color:Silver Material:Metal Package Contents: 4 * Door Reinforcement Lock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.