PrimeLine U 10327 Door Knocker and Viewer 916 In Bore 180 Degree View Angle Satin Nickel Single Pack

Used on entry doors to provide privacy while viewing from inside the home, and also as a decorative door knocker for visitors, Requires a 9/16 inch diameter installation hole, designed to install on 1-3/8 inch to 1-3/4 inch thick doors, with a total height is 5-1/2 inch, 180 Degree view, Brass construction with satin nickel finish, Will need a drill and 9/16 inch drill bit to install