Made of for tough polypropylene to protect your label. Reusable, Durable and Lightweight. Paper insert comes out for easy writing without removing ring attachment. Easily open and close flap over paper insert for identification with keys attached. Heat treated steel split for key ring and additional jump ring help tag place flat. large for key ring allow you to attach more keys or any items. Great for home, offices, keychains, bunches of keys, Pet ID Tags, Luggage tag, rental management companies, storage facilities and more.