Jul 21, 2026 - 01:12 PM
We’ve provided several answers to questions related to CompX National C9100 USPS-L-1172C Mailbox Lock , see some other helpful Q&A related to this product.
Question: Is there a universal key for mailboxes?
Answer: No, there is not a universal key for all mailboxes. Most mailboxes use individual locks with unique keys for security, although some systems (like apartment mailboxes) may use a master key held by postal workers or building management.
Question: How is this mailbox lock mounted?
Answer: It is clip mounted. Clip mounting makes installation straightforward and secure, which is especially helpful for quick replacements or installations in busy mailbox locks.
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