Reduce the chance of theft with the highest security mailbox on the market! This 1 Parcel Locker Horizontal Mailbox features one Parcel Locker. A smaller Carrier Access Door provides smaller pry points and increased overall strength. Made from a high strength, stainless steel, the USPS approved 4C Horizontal mailbox units were designed with an utmost regard for security and perfection. The secure double-wall door design increases pull test capacity on each door to 1500 lbs of pressure. A flush surface design and concealed hinges make tampering with and prying open mailbox doors close to impossible. >Units quickly install between wall studs, Protective Lock Rim prevents lock twisting & torque, 3-Point Lock Cam secures the door in 4 places, Flush Surface Design prevents dirt and ice build-up, Closer tolerance reduces the size of pry points, The Parcel Lockers measure 16"H x 15"W . Overall dimensions: 17"H x 16"W ADA Compliance, Recommended for Indoor Use Only