- The front door chains are made of high quality stainless steel, which resists rust and aging, for lasting durability. - This security door chain lock is chrome plated, providing corrosion and wear resistance. - Door chain locks are safety latches for swing doors that allow you to open the door a few inches for identification or ventilation while maintaining privacy and security for guests and residents. - The door chain can be used for any door. It is ideal for limiting door openings and securing front doors in residences, homes, hotels, motels, inns, and similar settings. - Should you have any problems, please do not hesitate to contact us. We are always there for you and will reply within 24 hours. - Heavy duty door lock chain is made of solid material and helps protect against violent entry into your home, an indispensable function for your personal safety and that of your family. - The door chain helps identify a caller before the door is fully opened and provides increased security on the front door, featuring an easy release chain when the door is closed. - In addition to added security, its chrome finish makes it suitable for indoor use and it will complement any home design. - Thanks to its surface mounting and narrow design, this door chain can be mounted to most door sizes with minimal effort and simple tools. - Use scenarios: - On residential front doors to verify visitors or ventilate the room without fully opening the door. - In hotels, motels, inns, and similar accommodations to limit door opening and enhance room security. - In apartments or offices to secure entry doors while identifying callers before entry.