REPLACEMENT LOCK – This multipurpose Prime-Line replacement mailbox lock is an easy fix and can easily replace lost or broken mailbox locks. Features 5 cams and an NA-14 key WORKS FOR SEVERAL BRANDS – This replacement mailbox lock works with most brands of mailboxes. BUILT TO LAST – The mail box lock and key set is constructed of diecast, brass, steel, and stamped steel materials; the steel components come finished in a corrosion-resistant zinc-plated finish; the cylinder face comes in a nickel-plated finish LOCKING SECURITY FEATURE – This lock has a security feature that prevents the key from being removed when in the unlocked position, which prevents forgetting the key, and ensuring the mailbox is locked every time it’s used. NOTE – This mailbox lock unlocks by turning the included keys in a in the counter-clockwise direction and has a retaining hex nut and retaining clip