The UL 180 Degree Door Viewer is a security device designed for installation on doors to provide a wide-angle view of the exterior. This door viewer features a 180-degree viewing angle, allowing for visibility through the door. It is constructed with a 1-1/16" lens diameter and is designed to fit a 9/16" hole. The unit is adjustable to accommodate door thicknesses ranging from 1" to 1-2/3". The finish is Satin Nickel. This product is suitable for use in residential or commercial door security applications. The viewer is designed to be mounted through the door, allowing users to see who is on the other side before opening. It is a standard component for entry doors where visual verification is required. The construction includes a lens and a housing that fits securely into the door preparation. This product comes with a limited 1-year manufacturer warranty and a limited 5-year finish warranty. The Satin Nickel finish provides a consistent appearance with other door hardware. The viewer is intended for use on standard entry doors in various settings, providing a clear view of the area outside the door.