With these indexes, you can maintain the right overview. The DURABLE letter index in half format makes it easy for you to organize loose documents in your folders. The letter index is perfect for sorting by names or places, but it can also be used to categorize recipes and receipts, making it easy to find them again by week. Treat yourself to this incredible ease of work and a more efficient workflow through a clear filing system. The indexes are made from polypropylene (PP) foil and are absolutely robust, reusable, and extremely durable.