Installing 4 LOCKING Mailboxes safe from mail thieves

Replacing a single nonsecure mailbox with 4 new locking mailboxes using the Architectural Oasis Model 6300. Trying out the Simpson EZ Spike post base. @ArchMail Locking Mailbox Oasis 6300 - https://amzn.to/4g7YcAp Screw Bolt Lag replacemnt - https://amzn.to/3XAufR9 Rubber Flex Spray - https://amzn.to/3AQe9er Simpson EZ Spike post base - https://amzn.to/3MyiPbd GRK 3inch Screws - https://amzn.to/3zb1ZMx