Got a Salsbury Industries FL 4B+ horizontal mailbox unit that needs a lock upgrade? This is your fix. The 3677 Replacement Master Commercial Lock is built specifically for private access on those exact models, so you know it's going to fit just right. It comes with two keys right out of the box, which is super handy. Salsbury's been making quality mailboxes and locks since way back in 1936, and they're even ISO 9001 certified, so you're getting a reliable, secure product. Installing this lock means your mail stays safe and only you (or whoever has a key) can get to it. Perfect for apartment buildings, offices, or residential mail centers. It's a straightforward, no-fuss solution for keeping things secure. Trust the pros and get that peace of mind.
