Description: Material: The Chain Door Lock is made from thickened stainless steel, ensuring wear resistance, durability, and long term use.Easy to Install and Use: The door chain lock is easy to install with the included screws, providing a user friendly experience.Partial Opening: The protective Door Latch allows the door to be partially opened for identifying visitors or receiving packages, adding an extra layer of security.Modern Design: With its polished stainless steel finish, this door security chain boasts a sleek and modern design that wonderfully matches contemporary home decor. Its smooth surface also offers a comfortable touch.Improved Security: This heavy duty chain lock acts as a secure locking device for your doors, allowing safe viewing and ventilation when the door is partially open. It cannot be opened from the outside, ensuring your security in your home bedrooms or office interior doors. Size Chart: 18.5cmx8.5cm/7.28inchx3.35inch Package Includes: 2 Door Chain Lock and 12 Screws Note: Please allow slightly errors 1-2cm differences due to manual measurement.