Mail Boss 7106 Curbside Locking Mailbox, Black Large capacity USPS approved high security locking curbside mailbox made of 12- and 14-gauge electro galvanized steel for strength and durability Patented anti-pry latch locking mechanism and 12-wafer disc lock to prevent leveraged entry Patented Fast-Trak Mounting Plate for easy installation on existing posts in minutes Stainless steel hinges and powder-coated finish for optimum weather resistance Includes 3 keys, reflective house numbers, 4 lag bolts and drill bit for installation. Locking access door with commercial grade high security wafer lock