Sturdy and Durable: Stainless steel material ensures the anti-rust and durable performance of the whole door chain lock, with smooth textured surface, corrosion resistant and prevent rust; while the thickened chain also includes a leather sheath, which provides double protection, and the pulling force can prevent breaking. Upgraded thickened design: Thickened stainless steel base and bold chain combined with stronger perforated installation give you a full sense of security. Ideal for single women and the elderly. Enhanced security: The lockable door chain effectively protects your family's security or privacy. Anti-theft protection to prevent your children from opening the door or your pets from escaping your home without permission. Easy to install: The door chain comes with screws for easy door latch installation. Protective locks are available for different types of wooden doors and can be installed horizontally or vertically. Multifunctional security chain: The anti-theft chain can be used for many kinds of doors, placed on or beside the door panel, which makes your home safer. Can be used in homes, hotels, apartments, rental houses, etc.