Durable and durable: Made of heavy duty stainless steel with maximum corrosion resistance and durability, the front door restriction lock slot will provide easy additional security for years to come providing additional security: this high quality front door security provides you with reliable protection against hackers. Door restricted, forcibly stopping entry allows you to unwelcome visitors practical and convenient: The precise design with SOUSTE and installation kit allows you to lock the flexible door with smooth sliding motion by applying the chain and editing it easily when closing the door easy to install: The home safety door bolt can be installed with a rooftop-mounted design and a narrow design easily on any door size/thin or tight frames with minimal effort. Installing a restricted door in your home will provide you with peace of mind and security against unwanted callers Buy with confidence: With built-in design and solid construction, this sliding door chain makes a nice addition to your home security. Just buy with confidence because we are always here to offer you 100% satisfactory service