Salsbury Industries 3690 Standard Replacement Salsbury Lock for 4B+ Horizontal Mailbox Door with Two Keys Go to amazon.com Related posts The 13 best mailbox lock replacement for 2022 FeatureStainless SteelAvailable for commercial mailboxes and residential mailboxesCorresponding key blanks (box of 50 keys) are available DescriptionSalsbury Standard Replacement Lock - for 4B+ Horizontal Mailbox Tennant Door - With Two (2) Keyed Alike Keys Per Lock.