[Package Include]2 pieces door chains with matching screws. The chain length is about 163mm. [Quality Material]The door chain made of high-quality stainless steel, strong and durable, can effectively prevent impact and kicking, not easy to break. [Safety Design]Increase the spring lock design to more safely prevent external opening of the door, provide protection before opening the door, avoid theft or accidental forcible intruders, prevent children from accidentally running out, provide better security for your family. [Easy to Install]We provide matching screws for the door chain lock, which can fully meet your installation needs. You only need to choose a suitable location and tighten the screws to use. [Wide Application]The door chain look can be used for internal and external locking. It can be used for all kinds of wooden doors, and can also be drilled and installed on iron doors. We recommend you use it in homes, rental houses, apartments, hotels, etc. Size:As Shown Colour:silver