Xinxinlin L-1172C USPS National Mailbox Lock Replacement C9100 – 3 Keys, 6 Shaped Tabs

Upgrade Your Mailbox Security with the Xinxinlin L-1172C National Mailbox Lock C9100

Enhance the daily security of your mailbox with the Xinxinlin L-1172C National Mailbox Lock C9100. Built to align with USPS standards, this robust replacement lock delivers reliable operation and a confident, controlled feel when turning the key. The C9100 designation indicates clockwise rotation, a detail that matters for compatibility with a wide range of USPS housings you might encounter in the field.

Security is amplified by the keyed-different (KD) design: each lock is uniquely keyed, limiting cross-access and helping you manage who can retrieve mail. This is especially useful for multi-tenant setups, shared mailboxes, or households that value clear access control without rekeying the entire unit.

• What’s included: 1 lock cylinder, 3 keyed-alike keys, and 6 shaped locking tabs for quick setup and flexible mounting.
• Durable build: High-quality materials designed to withstand daily mailbox use and exposure to the elements.

The replacement kit is designed for a straightforward upgrade, consolidating everything you need into one package. The six shaped tabs provide flexible alignment options to fit different mailbox housings, helping you achieve a snug, secure fit with minimal downtime. If you have questions about compatibility or installation, our support team typically responds within 24 hours to help you proceed confidently.

In real-world use, this lock can offer an added layer of assurance for households and property managers who handle mail for multiple residents. The unique KD setup means you can assign distinct access without reshaping the entire locking system, while the durable construction is ready to endure regular use and routine weather exposure.

Quality, reliability, and practical security

Beyond the basics, the L-1172C emphasizes consistent performance and easy maintenance. Its clockwork-like operation is designed for predictable key turns, while the materials chosen for longevity help keep maintenance needs to a minimum. This isn’t a promise of guaranteed results, but it does reflect a focused approach to a functional, long-lasting mailbox upgrade.