Salsbury Industries 3635AFP 4B Plus Horizontal Mailbox with Master Commercial Lock, 35 A Doors 34 Usable, Front Loading, Private Access, Aluminum Made entirely of aluminum Doors include a 5 pin cylinder cam lock (with 2 keys) One mailbox opening is required for a master commercial lock (included) and cannot be used for mail distribution Front loading door panel swings on a continuous hinge Include factory installed 3/4" W x 1/4" D trim and a solid rear cover