Fellowes 18mm 5:1 pitch metal binding spirals in silver (100 units) 5115701 combine high volume capacity with a distinctive metallic look. With an 18mm diameter and 5:1 pitch, this pack of 100 silver metal spirals can bind up to 150 A4 sheets. They allow 360-degree opening, making them perfect for taking notes or making copies without disassembling the structure. Recommended for technical manuals, compendiums, and financial reports.