Exterior door deadbolt strength and security grades

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When choosing a deadbolt for your exterior door, look for ANSI Grade 1 or 2 ratings, which indicate higher strength and resistance to forced entry. The bolt itself should be at least one inch long and made of hardened steel, while the strike plate needs heavy-duty screws anchoring into the door frame. These factors combined determine how well the lock holds up against kick-in attacks and picking attempts.