Door striker, 6-inch zinc alloy front door striker with door viewer for doors 1 to 1.5 inches thick, matte black

The spectator knocker is used on the front door to ensure privacy when viewed from inside the house, or as a decorative knocker for visitors.
The 180-degree mounting hole requires a 9/16" (14 mm) diameter mounting hole.
The knocker can be installed from 1-3/8" to 1-7/8" (35-47 mm) door thickness
The door knocker is made of durable die-cast zinc alloy with a brushed nickel finish.
The design is elegant and simple, and can be well-suited to all kinds of doors such as UPVC doors, wooden doors, and steel doors.