General description The Security Door Chain is an anti-theft door lock designed to enhance the safety of your home. Made from high-quality stainless steel, this durable lock features a thick 3mm chain that resists breaking and provides long-lasting protection. Its innovative design includes a spring-loaded anti-theft button, ensuring that the chain remains secure and cannot be easily tampered with from the outside. Technical specifications Material: Stainless steel Chain thickness: 3mm Includes: 4 screws for installation Installation Easy to install behind the door using the included screws. Compatible with wooden or metal doors of all types. Can be installed above or next to the door frame. Usage Provides additional security beyond standard door locks and latches. Prevents unauthorized access by strangers and protects children from leaving the house unsupervised. Ideal for individuals living alone or families seeking extra safety measures. Other information The three-layer brushed