2 in 1 Door Bolts with Anti-Theft ChainOne Lock= one sliding lock + chain lock. The door chain lock is equipped with spring button lock that can enhance the anti-theft performance and ensures safe viewing and ventilation while door is partially open, providing added security for your home and office doors.Security Anti TheftDoor Chain Lock adds additional security and privacy for your bedrooms, bathrooms, toilets, as a double protection from unwanted entry. Barrel bolt door lock chain also can be installed in windows, cabinets, backyards, kennels, fences, porch, closet door, outside shed, laundry room, chicken coop. It also can improve children's safety at home, avoid your children or kids free to open the drawers or cabinet doors.Sturdy Durableonly source the highest quality components. Heavy duty chain door guard with lock is made with high quality stainless steel for rust resistance, used latest electroplating and polishing technology to increase service life. Brushed Nickle finish surface slide lock which improves corrosion resistance, enhances wear resistance and hardness.Quick to InstallOffering 6 screws needed for installation for free. You only need to use a screwdriver or drill to complete the DIY installation in 5 minutes. Chain Door Guard with Lock supports installation in 360 degree. Different installation directions are suitable for different places.