This safety locks for swing doors offer reliable protection against intruders. It allows indoors to open a few inches of doors for identification or ventilation while providing privacy and security for guests and residents. It is also possible to install the latches inaccessible to children so that they cannot open the doors themselves, thus providing more child safety door security. Suitable for residential, apartment, hotel and etc. Features: - Provide extra security and privacy, easy to unlock from the inside but too strong to open from the outside - Heavy duty design ensure rugged quality and withstand up to 600 pounds of force - Easy daily operation, open from inside with a simple swing action - Child safe lock, install out of children's reach so they cannot open the door themselves - Strong, durable and long lasting - Not easy to rust or oxidize - Installation is quick and easy - Made of high-quality solid aluminum alloy with a beautiful finish to complement your lovely home décor