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Grading System FAQs

Q: Which grade of door lock offers the best security for my home?


Industry experts agree that a Grade 2 NightWatch® deadbolt with a 1' bolt is the ideal choice for home security. For maximum protection, deadbolts are recommended on all entry doors including front, rear, and side entrances as well as any walk-in doors leading to your garage.

Q: What is the difference between Grade 1, Grade 2, and Grade 3 door hardware?


The ANSI grading system is a voluntary standard widely used within the door hardware industry, and is designed to determine the durability and level of security provided by the lock.

  • Grade 1 – commercial quality door locks most commonly used in heavy traffic commercial buildings.
  • Grade 2 – light commercial use and heavy residential use.
  • Grade 3 – standard residential security.