Just because a person is cordial enough to knock at your door doesn't mean that he isn't a conman or burglar out to knock you out and steal all your belongings. So you can probably understand the usefulness of a spy hole, or a door viewer.
A door viewer allows you to look at the person knocking or ringing your doorbell first before opening the door. Check out this video to learn how to install a door viewer.
This video shows how to quickly install a door viewer (often called a spy hole) into a solid wood door.
Just updated your iPhone? You'll find new Apple Intelligence capabilities, sudoku puzzles, Camera Control enhancements, volume control limits, layered Voice Memo recordings, and other useful features. Find out what's new and changed on your iPhone with the iOS 18.2 update.
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