Patented Innovative One-Piece Theft Deterrent System, Designed For Libraries SecureCase ONE™, a new DVD rental case for libraries to be available in June, 2008, features a patented easy-to-use slide-and-lock one-piece theft deterrent system designed to work with existing detachers currently on the market. The one-piece system eliminates the need to keep track of and store two or more individual components used with conventional locking mechanisms.