Loose Leaf Binding is one of the simplest methods of binding. Cut pages are punched with holes to accommodate the rings or posts contained in the binder. An advantage to both ring or post binders is that pages can be added or removed easily. The ring binder also has the advantage of allowing the pages to lie flat when the book is open, making it a good choice for technical or training manuals. An allowance for the inner margin (gutter) must be made to allow for the holes that are punched in the pages.