The Rockwood 627.CRM brass door viewer has a 190-degree viewing range, a heavy-duty privacy cover, and a bright chrome finish. A heavy-duty privacy cover covers the inside of the viewer to prevent visibility from the outside to the inside. The viewer meets American National Standards Institute (ANSI) A156.16 specifications and is UL fire rated for up to 1-1/2 hours. It can be installed in a 9/16" diameter hole in doors 1-3/8" to 2-1/4" thick.

Door viewers, also called peepholes, consist of a lens and cylinder which is inserted into a door, allowing a view outside. The amount of visibility is determined by the degree of the lens; the higher the number, the greater the visibility. Door viewers are sometimes incorporated with door knockers.

Rockwood Manufacturing Company manufactures door hardware. The company, founded in 1946, is headquartered in Rockwood, PA.