This should definitely be included in the mailbox. Works for what it takes and is built to last. Note that on at least some large mailboxes, if you are installing "long ways" on a 4x4 post, you will need a piece of wood between the mailbox and the post to fill the gap. It's hard to explain, but it's a pain in the ass if you don't anticipate another trip to the Home Store. You should have included that separator as well.
KYODOLED Wall Mounted Depository Drop Safe: Secure Anti-Fishing Steel Mailbox With Key Lock, Heavy Duty Security Storage For Home And Business Use
20 Review
KYODOLED Locking Wall Mount Mailbox,Mail Boxes Outdoor With Combination Lock๏ผSecurity Key Drop Box,12.59Hx 8.46Lx 3.35W Inches,White Large
36 Review
HopeWan Self Adhesive Mailbox Numbers, 2 Inch Door Numbers Stickers For Apartment Home Office Room, Set Of 10 Pcs. (2" 10 Pack ( 0-9 ), Silver)
48 Review
Secure And Spacious: Decaller Black Metal Wall Mounted Mailbox With Key Lock And View Window
22 Review
32Oz Gorilla White Waterproof Patch & Seal Liquid For Effective Sealing (Single Pack)
30 Review
Silver Holographic Stars Glitter Grout Tile Additive 100G - Easy To Use For Tiles, Bathroom, Wet Room & Kitchen
14 Review
Pack Of 1 Natural Wood Color 8 Ounce Bottle Gorilla Wood Glue
42 Review
Gorilla Waterproof Patch & Seal Liquid - Black 16Oz - Ultimate Solution For Quick Fixes (Pack Of 1)
39 Review