High quality, maintenance free, no wiring, no batteries, one way viewing lens.;Designed to fit wood and steel doors up to 4-3/4 thick.;Requires to drill 2 holes through the door. (see the template in the pictures above).;Mounting and fastening hardware includes only screws for wood doors.;We manufacture and include self drilling screws for steel doors.

Product Features

• Auth Florence, Non Electric, Mechanical Door Chime, Doorbell and Viewer #686 (Anodized Gold Aluminum)
• Anodized Gold Aluminum