Upgraded Version Design: Door locks made of zinc alloy with one-piece design. More robust and durable. 10 times stronger than a normal deadbolt against being kicked in. Improve your security and prevent unauthorized entry. Child Proof Locks:Home reinforcement door latch for kids safety with an Arc design, unable to unlock the door with a hook, It can be installed higher to prevent children from opening the door to strangers or going out. Keep Home Security:Security door Lock adds extra security measures for your family members while you are away on business. Suitable for both elderly parents and ladies when they are at home alone.keep your family peace in mind. Easy Install and Use :Make installation a breeze with screws. It only takes a few minutes to install and one second to close. The Installation manual is included in the package.Please adjust the tightness before installation with the screws on the back. Compatible with Flar Door :Room door lock compatible with flar door and only applied door opening inward. Idea for apartments,dormitories,Hotel,bedrooms and other people in need.house warming gifts brings you additional safety, security, and privacy.