Wire-O, Twin-Loop, or Double Wire are all registered trademarks for the binding elements that utilize square hole patterns.

If you wish to make life simple, 3/8" blank margin with "no type" or "pictures" on all mechanical binding will keep you out of trouble. Keep in mind that the dimensions given are from final bindery cut, and does not include any manufacturing dimensions planned in the job such as bleed, or mill/grind off. Those dimension need to be added during layout planning.

If you are providing us with collated/trimmed to final size book blocks, please consult us before cutting the book.The number of holes per inch and equal spacing from head and foot trim positions cannot be adjusted for in Spiral Binding. The book has to be a given size, based on the spiral pattern being used. The bindery will then center the hole pattern head to foot, insuring both head and foot margin from holes to outside edge are equal to the spacing between holes.