Binditek 50 Pack Plastic Spiral Binding Coils, 12mm(1/2") Binding Spirals, 90 Sheet Capacity, 4:1 Pitch, Multi Color, Red, Blue, Yellow, Green, Pink, for Students and Coworkers

The Binditek 100 Pack Plastic Spiral Binding Coils offer a convenient and affordable solution for binding documents. With a 6mm diameter and a 4:1 pitch, these coils can handle up to 30 sheets of paper, making them suitable for a variety of projects. One of the standout features of these coils is their versatility. They can be used in a Cinch binding machine, although some users may need to stretch the coil slightly to release some tension. Additionally, the coils can be easily cut to any length needed, making them adaptable to different paper sizes, including half letter. In terms of durability, the coils are made of a plastic material that is not very sturdy according to some users. However, others have found them to be good and sturdy, without any issues. It is worth noting that they can retain their shape when subjected to normal wear and tear, but may get damaged if stepped on with shoes. The packaging of the coils is well-done, with a helpful chart on the bottom of the box that provides information on sizes, paper capacity, and measurements in both metric and imperial units. This feature has been appreciated by users who find it useful for reference. Overall, the Binditek 100 Pack Plastic Spiral Binding Coils offer a cost-effective solution for binding needs. While durability may be a concern for some, the versatility and ease of use of these coils make them a popular choice among users.