5/16 inch black wire binding spines, 25 per pack, each holds up to 50 sheets. Ideal for creating professional, secure bound documents with minimal effort. Key benefits Secure binding for up to 50 sheets per spine, keeping reports and manuals neat and intact. Standard 5/16 inch diameter matches common binding sizes for predictable results. Black finish delivers a clean, professional appearance for presentations and reports. Pack of 25 spines supports multiple projects and reduces the need for frequent restocking. Durable metal construction and precise winding reduce the risk of jams and misfeeds, helping maintain workflow efficiency. Compatible with Fellowes binding machines for straightforward integration into existing office setups. Product features Function: wire binding spines for document finishing and organization Compatibility: fits compatible binding machines, including Fellowes models Size: 5/16 inch diameter, up to 50 sheet capacity per spine Quantity: 25 spines per pack Color: black Performance: designed for smooth operation and consistent closure Practical use scenarios Office reports and proposals: bind quarterly reports, client proposals, and internal manuals for a professional finish. Training materials and course packets: assemble training guides or classroom handouts that stay organized and easy to flip through. Small business and home office projects: create product catalogs, receipts, or reference binders without specialized service. A straightforward, reliable option for binding needs that keeps documents organized and presentable while supporting consistent, hassle reduced operation.