I wanted a peephole with a good clear picture and a privacy screen. This is the best I've found and when the area you're looking from is dark it's hard to tell what you're looking at. The large diameter (requires a 28mm hole) seems to really help with a bright/clear image. I recommend a TOGU DB-01 1-1/10" (28mm) heat treated HSS drill bit for the installation. I have a steel door with a foam core for insulation and the installation took about 3 minutes, most of which was drilling.
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