Exterior door deadbolt strength and security grades

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Exterior door deadbolt strength and security grades are something you don't think about until it matters. I learned that the American National Standards Institute grades them from 1 to 3, with Grade 1 being the toughest for heavy use. A solid deadbolt should have a hardened steel bolt that resists sawing and a reinforced strike plate with long screws anchored into the door frame. It's not just the lock itself; the frame and door must be solid too. I always check for that BHMA certification mark…