Two-Piece Hard Bound (also known as Two-Piece Boards) refers to the process where the front and back covers of the book are created on two separate boards. The cover is nonflexible and is supported by a paper-wrapped board, making it incredibly durable. This option allows the book to lay flat when open. The book and boards are bound with a plastic coil. This cover is used where a high-end look is desired. The boards take approximately 6 weeks to create after proof approval.