You might not want to spring for a double-sided lock, though. Many municipalities consider them to be a fire hazard because you need a key to unlock the door from inside, which creates the ...

Fire doors are designed to protect your home ... building authority or a contractor to see what hardware options — or smart locks — are safe to use for your home's doors.

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To learn more about our testing, see our door lock buying guide. For more door lock options, check our complete door lock ratings.