Measures 3 high x 2-1/8 wide x 0., 45 thick It is inserted in a hole in a door to allow one to see out of the closed door while preventing those outside from seeing in. Decorative Rockwood 576.26D Brass Gravity Door Coordinator, 1" Width X 5-7/16" Length, Satin Chrome Plated Finish Door Knocker 26D cast brass door knocker has a built-in door viewer and a satin chrome plated finish (Rockwood/BHSM number US26D/626). Rockwood 614V-626 Door Knocker with Viewer - Satin Chrome Plated Brass What's in the Box? (1) Rockwood 614V. A door viewer, commonly called a peephole, consists of a metal cylinder and a glass lens. Provides space for engraving name or number , Meets ANSI A156., 16: L03161 specifications Rockwood Manufacturing Company manufactures door hardware. It measures 3 high x 2-1/8 wide x 0., 45 thick, and it includes two #8-32 x 2 flathead machine screws and two #8 finish washers for attaching the knocker to standard 1-3/4 thick doors. Historic Houseparts, Inc. > Doorknockers > Solid Brass Door Knocker The Rockwood 614V. Our door knocker designs are both decorative and functional, allowing facility visitors to effectively announce their presence. Enhance your entryways with... Cast brass door knocker and door viewer with a satin chrome plated finish