Xinxinlin L-1172C lock front view for USPS-compatible security.
Xinxinlin L-1172C side profile highlighting durable construction.
Xinxinlin L-1172C includes three keys for easy access.
Xinxinlin L-1172C installation tips image for quick replacement.
Xinxinlin L-1172C lock mechanism close-up for reliable performance.
Xinxinlin L-1172C in-use on mailbox ensuring secure deliveries.
Xinxinlin L-1172C packaging with three keys and warranty info.

Xinxinlin

Xinxinlin L-1172C National Mailbox Lock Replacement C9100 – 3 Keys

High-performance tools and home improvement made for confident daily results

$21.48

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Why customers choose TaskHolt Tools

Protect your mail with the Xinxinlin L-1172C National Mailbox Lock

Upgrade your mailbox security with a lock designed to meet USPS standards. The C9100 model rotates clockwise and is keyed different, so each unit is unique from others you may encounter on the street.

Included with the lock are three keys, giving you spares for family members or trusted assistants, and an easy replacement process that fits common national mailbox housings.

What makes this lock stand out

  • USPS L-1172C compatibility ensures a reliable fit for standard mailboxes
  • 1172C keyed different adds an extra layer of privacy and security
  • Three keys included for convenience and peace of mind
  • Durable construction built to resist daily use and exposure
  • Simple installation that most handy homeowners can complete
  • Clockwise rotating design tailored to compatible mailbox pockets

Ideal use cases

  • Replacing worn or missing USPS locks in residential mailboxes
  • Upgrading security for shared or rental properties
  • Maintaining mail safety during travel or long absences

Real-world usage tips

To install, align the housing, insert the keyed cylinder, and secure it according to your mailbox housing instructions. For questions, our support team aims to respond within 24 hours with friendly guidance.

FAQ

Q: What comes with the Xinxinlin L-1172C National Mailbox Lock kit?

A: The kit includes the C9100 lock, three keys, and basic installation guidance.

Q: Is this lock USPS standard compliant and keyed different?

A: Yes, it is designed to meet USPS-L-1172C standards and offers a keyed-different configuration.

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