Salsbury Industries 4390 Replacement Lock Set for Roadside Mailbox, Mail Chest and Mail Package Drop with 2 Keys Includes 2 locks with 2 keys per lock Lock Dimension: 1" W x 1" H x 2" D Compatible product manufacture by Salsbury Industries Salsbury Industries is an ISO 9001: 2008 certified company and has excelled in the field of manufacturing since 1936