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If you live in a home built before the 1970s, think brownstones, row houses, or early ranches, your exterior door probably still has a mortise lock, a solid, box-shaped mechanism that slides into a pocket in the edge of the door. In contrast, most modern doors use cylindrical locks, the round, easier-to-install style you see on shelves at any big-box store. So when it’s time to remodel or upgrade security, many homeowners ask: can you repla… Read more