Fellowes 14mm 5:1 pitch metal binding spirals in black (100 units) 5110501 ensure robust binding for your thickest reports and catalogs. With a diameter of 14 mm and a 5:1 punch pitch, these 100 black metal spirals hold up to 110 A4 sheets. The black color is ideal for a sober and executive look in any publication. Recommended for administrative files, minutes, and corporate manuals.