Security and privacy: Swing door locks are security locks for swing doors, allowing people inside the room to open the door a few inches for identification or ventilation while providing privacy and security for guests and residents. This lock bar can also be installed out of reach of children so that they cannot open the door themselves, providing extra child safety. Durable construction: This chain door guard is made of high-quality carbon steel with a polished finish and an 8-inch welded steel chain. It is strong and durable, guaranteed to last, and installation is quick and easy. All mounting hardware is included and it can be used on a variety of door types above or next to the door frame. 【Wide range of applications】It can be used for all types of doors. Perfect for restricting door openings and securing doors in residences, homes, hotels, motels, hostels, etc. Easy installation: Make sure your door frame is recessed. The security lock is attached to the mounting screws. Just use your drill to mount the lock on the door, cabinet or window. The process is very simple and almost any homeowner can easily complete the job. Package contents: 1 door chain; each lock comes with 6 screws.