Perfect binding is an adhesive-based bookbinding method that makes for a very professional-looking final product. ... Binding glue is added manually to the spine of the book using a specialized brush before the book is put through the binding machine, completing the process. "It quickly produces hard and soft cover books as well as Manager covers, tear-off pads and strip binding. The Fastbind Elite features the exclusive Paper Grain Opening (PGO) system. Unlike other spine rougheners that grind the spine creating lots of noise and dust, the PGO opens the paper grain with very little noise and no paper dust!"