1. The front door chains are made of quality stainless steel, which is resistant to rust and aging. 2. This security door chain lock is also chromeplated, ensuring corrosion and wear resistance. 3. Door chain locks serve as safety latches for swing doors, allowing occupants to open the door slightly for identification or ventilation while maintaining privacy and security for both guests and residents. 4. The door chain is suitable for any door, making it ideal for limiting door openings and securing front doors in residences, homes, hotels, motels, inns, and more. 6. The heavyduty door lock chain is crafted from solid materials, providing protection against forced entry and serving as an essential safety feature for you and your family. 7. The door chain enables caller identification before fully opening the door, enhancing frontdoor security and featuring an easyrelease mechanism when the door is closed. 8. In addition to added security, its chrome finish makes it for indoor use, seamlessly complementing any home design. 9. With its surfacemounting and narrow design, this door chain can be effortlessly installed on doors of any size using minimal tools and effort. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin