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Replacement Lock For Composite Door If your key isn't turning inside your door made of composite, it could be a problem with the gearbox or cylinder. Christopher The Locksmith would recommend upgrading to a high-security lock as older models do not come with anti-drill, bump, or anti-snap features which are now standard in new doors. Deadbolt Composite doors are a great choice for any home. They are stylish and offer superior security. Like other products, they aren't immune to problems that may happen