Features: 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, Child-proof and tamper-proof: this door guardrail adopts spring-loaded design to ensure the safety of children. 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. 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. 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. Specifications: Material:Alloy Size:Approx.7.62x2.54x3.5cm/3x1x1.37" Package Includes: 1 Piece Door Lock note: Please allow 1-2cm errors due to manual measurement,Please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.