Fellowes 5:1 pitch 10mm white metal binding spirals (100 units) 5113001 offer a durable and aesthetically pleasing continuous binding. Made of white plastic-coated metal wire with a 5:1 pitch (5 holes per inch), these 10mm diameter spirals bind up to 75 A4 sheets. They allow 360-degree rotation of the document for easy reading and photocopying. They are highly recommended for diaries, notebooks and school textbooks.