Black Metal 290 Degree Wide Angle Peephole Door Viewer Scope This Door Viewer easily installs in 5 minutes with a 1/2 Inch Viewer Bore Clearly see who is at the door from the safety of your home Assures a clear 290 degree full view with a silver coating glare tint Can Replace Conventional Peepholes Adjustable Fit Doors From 1 3/8 To 2 1/4 Inches Thick Door viewer is a high technology product, made with four precision glass lenses