Protect Your Home: This door lock gives you more security and privacy. The door cannot be opened from the outside after closing the lock, even with a key or violence. Greatly improves your security and prevents unauthorized entry. Improved security design: The door security device is cast in one piece of zinc alloy that will not rust, high strength, not prone to failure. It's also easier to use with just one finger. Quick release in case of emergency. Easy to install and use: makes installation easy with the screws provided. It only takes a few minutes to install and a second to close. The installation manual is included in the package. (Please adjust the tightness before installation with the screws on the back) Child lock: : Install door locks in higher places to prevent children from opening the door for strangers and getting out. Safety door lock provides extra safety measures for little ones. Widely Used: High security door lock fits many scenarios, such as apartments, dorms, bathrooms, bedrooms. Perfect for single women, families with children, elderly parents. This is an ideal item to give you home security and more peace of mind.