Peephole
A peephole is a small door viewer lens installed in a home door for secure visibility of visitors, commonly used as basic home decor hardware.
Estimated value as of 2026 路 Source: https://www.walmart.com/c/best-sellers/door-viewers
Fun Fact
The modern peephole door viewer was invented in 1962 by a Swedish engineer named C. G. Magnus, featuring a wide-angle 160-degree lens that allows viewing without distortion, revolutionizing home security.
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