Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 inch, Steel and Diecast Product Description This chain door guard is constructed from steel and comes plated in brass. It secures your door while allowing for viewing or ventilation and can be unlocked from the inside or outside with the provided key. Comes with fasteners for easy installation. From the Manufacturer This chain door guard is constructed from steel and comes plated in brass. It secures your door while allowing for viewing or ventilation and can be unlocked from the inside or outside with the provided key. Comes with fastners for easy installation. Features This Chain Door Guard is a security locking device that allows doors to slightly open for safe viewing and ventilation All components come in a beautiful, corrosion resistant, bright brass-plated finish Designed for use on hinged entry doors that swing inward, into the dwelling Mounts out of childrenft.s reach to help prevent them from opening a door themselves to enter or exit into dangerous areas Easy to install, key-operated lock can be mounted on, or beside the door casing, mounting hardware included Durable welded steel chain with a bolt that slides into keyed mechanism to lock. Uses B1 keyway, ILCO (1098M) USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.