can display text on both sides, so it can display twice the content of ordinary key tags Each one is supplied with a white paper card insert to write on as you want. Clear screen protects card to avoid damage from water or sweat. Work great for name tags on keys, backpacks, luggage or anything else that needs an ID. Ideal for home, offices, hotel, rental management. The card insert comes with a clear plastic protective cover to keep the card clean and dry. Window label slides out once ring is removed.The alloy ring is strong and robust enough to carry several keys.