Model No. SLL0403BOX

Frequently Asked Questions

• I bought some Master Lock door hardware a few years ago, and it's not functioning properly. How do I get it replaced?

  Q: I bought some Master Lock door hardware a few years ago, and it's not functioning properly. How do I get it replaced?

  A:

  In December 1997, Master Lock sold off an older division which made door hardware products. However, we are still honoring the warranty. Please call 1-800-308-9244 for information regarding warranty.

  Note: We do not have any replacement parts available for door hardware products purchased prior to 1997.

  If you purchased Master Lock door hardware products after March 2, 2006, you can find more information regarding these products at www.masterlock.eu.

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

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

  A:

  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.

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

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

  A:

  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.