Mail Boss Package Master Quad Mailboxes with Post

Click image to enlarge.
Retail Price:$1292.60
Our Price:$1124.00
  • Free Shipping
  • In Stock
  • Ships in 24-48 Hours.
  • The ultimate post mount 4 unit mailbox!
  • Designed for mail delivery to up to 4 residences at one location.
  • These USPS approved 4 Unit Mail Boss Package Master kits come with all the required components for fast and easy mailbox installation including 4 Mail Boss Package Master locking mailboxes, a 4 Box Spreader Bar, Mail Boss post plus 4 sets of 3 keys, installation hardware and reflective mailbox address numbers.
  • Each Mail Boss locking mailbox features extra-large capacity to safely store weeks’ worth of mail, including small packages and magazines. Vandal-proof red flag marks new mail delivery.
  • Make use of the outgoing mail slot, incoming mail slot (featuring patent-pending “Mail Shield” technology by Mail Boss prevents fishing) and a large mail retrieval door.
  • Heavy-duty commercial grade galvanized steel, commercial grade 12-disc wafer lock and patented anti-pry latch makes the Mail Boss Package Master security mailbox virtually impenetrable.
  • Fast-Track Mounting system makes it easy to install these Quad Security Mailbox kits in minutes.
  • The 4 Box Spreader Bar fastens to the post providing a surface to mount all four Mail Boss mailboxes.
  • Choose from an In-Ground or Surface Mount Post design, made from heavy-duty 14 and 10 gauge galvanized steel.
  • Ultra durable powder-coat color options include Black, Brown, Granite or White.
  • View MailboxWorks’ full line of Multi-Unit mailboxes.
see more details

Finishes and Accents

Swipe left or right.

Product Details


Item Height (inches) Width (inches) Depth (inches)
Mailbox 16" 12" 21.5"
In-Ground Post 43" 4" 4"
Surface Mount Post 27" 4" 4"
Spreader Bar 2" 47.5" 5"


  • Mailbox Item Number: MBMMASTER
  • In-Ground Post Item Number: MBPGM
  • Surface Mount Post Item Number: MBPSM
  • Spreader Bar Item Number: MBZQUADSPRD
  • Includes: Mailboxes, Post, Spreader Bar, Lock with 3 Keys, Reflective House Numbers, All Assembly Hardware
  • Manufacturer: Mail Boss Mailboxes
  • Shipping Weight: 227 lbs.
  • Locking: Locking mailbox.