- The Corner Cut Folder is designed with one piece of board cut so that it provides a flat, unbroken bottom, with flaps forming the sides and ends, and extensions of the side flaps meeting to form the top. Commonly called, “Bookfolds” or “Bookwraps” the one piece folder has a flat bottom with two short flaps forming the sides at each end and two longer, wider flaps that form the front, back and top of the box. The wider flaps either meet or overlap on the top, depending on the depth of the contents. The four panels are usually scored (creased) at multiple depths. One piece folders are used to package shallow depth items such as books and pictures. Shipper for books, posters, and picture frames! This is a simple style that allows for easy loading of objects