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Fixing French Door Locking Mechanism Replacement You'll want to secure your french doors safely. This can be accomplished by selecting locks that keep your door safe without hindering airflow or altering the aesthetics of your space. French door locks are typically a three-point lock system that has flush bolts on the upper and lower edges of each door panel and a lockset on the operable door. This system is tough to break. Fixing a French Door that won't lock If your doors don't lock or latch prop