This package includes 100 plastic spiral binding coils, each with a 6.4mm (0.25-inch) diameter and 12.2 inches in length, suitable for securely binding documents. The 360-degree rotatable design allows smooth page-turning, making reading and editing effortless—you can easily add or remove pages as needed. Made from quality, durable plastic, these spiral binding coils ensure long-lasting use while keeping your documents neatly organized. The spiral binding coils won't take up much space, making them suitable for on-the-go professionals. These spiral binding coils are suitable for office documents, engineering papers, business projects, and presentations.