Made of electro-galvanized steel, Salsbury 4600 series traditional mail boxes are available in horizontal (#4610) and vertical styles (#4620) and are designed to be surface mounted mailboxes. They feature a durable powder coated finish available in four (4) contemporary colors and include 5'' detachable magazine hooks. Stainless steel locking security kits with two (2) keys for mail box security are available for both styles as an option upon request. Traditional mail boxes may be used for U.S.P.S. residential delivery. Master postal locks are not required.