Easy to use: put your finger on the top of the safety door lock, slide the lock away from the bottom plate along the direction of the door, and then pull it outs Easy installation: install the safety door locks on the door frame with an electric screwdriver and a drill bit to complete DIY. The reinforced door lock has been installed for less than 5minutes. Equipped with two sets of screws, four 1-inch (about 2.5cm) and four 2-inch (about 5.1cm) screws, and the length of the screws can be selected as required Child-proof and tamper-proof: this door guardrail adopts spring-loaded design to ensure the safety of children Keep your home safe: the safety door lock is designed to withstands 800 pounds (about 362.9 kilograms). 12 times strongers than the ordinarys door bolt, to prevent being kicked in This lock provides an additional layer of security for your bedroom, front door, or any other entryway. Rest assured knowing that your doors are reinforced and protected, Manufacturer: Xuancai