Compatible with USPS National C9100 and CompX National L1172C Mailboxes Secure, durable, and designed for a precise fit, this mailbox lock replacement is compatible with USPS National C9100 and CompX National L1172C models. Perfect for maintaining mailbox security in exterior pedestal-mounted neighborhood boxes, NDCBU units, and CBU applications. Key Features: Compatible with USPS National C9100 and CompX National L1172C Mailbox Locks Cam rotation: 90 degrees clockwise for reliable lock engagement Cylinder type: pin tumbler for strong, secure performance Keying type: keyed different for enhanced protection Includes 5 interchangeable cams for versatile installation options Meets OEM standards for fit and functionality Benefits: Protects mail from unauthorized access with a dependable locking mechanism Compatible with multiple USPS and CompX National mailbox systems, reducing replacement hassle quality construction ensures longlasting use even in outdoor conditions Installation: Easy to install with standard tools Wearing gloves during installation is recommended for safety For results, follow a USPSapproved installation video guide to ensure correct setup Material and Quality: Constructed from durable, grade materials tested by the manufacturer to meet OEM requirements Resistant to wear, corrosion, and frequent use Use Scenarios: 1. Replacing worn or broken locks in USPS neighborhood pedestal mailbox units to restore security 2. Compatible with CompX National L1172C Mailboxes 3. Installing on outdoor centralized mailbox systems to ensure tenants and residents have secure access This lock replacement provides a dependable, secure, and easy-to-install solution, compatible with USPS National C9100 and CompX National L1172C models, ensuring reliable mail protection for a variety of residential and commercial mailbox systems.