Spiral or Wire?
Wire bound books are made of individual sheets, each punched with a line of round or square holes on the binding edge. This type of binding uses either a 3:1 pitch hole pattern with three holes per inch or a 2:1 pitch hole pattern with two holes per inch.
Spiral bound and wire-o booklets share capabilities that you cannot find in other binding options. These capabilities are 360 degree page rotation, no minimum page count requirement, and able to be bound with card covers.
The difference between wire and spiral binding then is the type of binding used to put the documents together. Many people that look for printing services aren’t sure of the difference between wire and spiral binding but there is a difference.
Spiral binding uses a plastic coil and Wire binding uses a metal wire. You can easily determine which type of binding you require by asking yourself whether your book is for formal use (wire binding) or for reference, everyday use (spiral binding).