Easy to Write: You can easily write numbers or text on the 4x3.8cm/1.57x1.5 inch square blank white key tags with a marker. Quickly track items and identify them at a glance. Reusable Material: These square key tags are made of heavy-duty plastic, which is heat-, waterproof and not easy to break. It can be used for a long time. Product Content: Package includes 100 pieces of key tags, and 100 pieces of metal snap hooks. Easily snap them into slotted or rack-mounted key cabinets, boxes, or keyboards less than 0.25cm/0.1 inch thick. Enough quantity to meet your needs. Metal Snap Hook: Each hanging key tag comes with a sturdy metal snap hook that securely holds keys. The metal hook easily attaches to your bag, wallet, zipper, wristband for easy carrying. Widely Usage: Perfect for rental, commercial or personal use. perfect for marking keys or parking spaces, gym lockers, cabinets boxes lockers, suitcases, hotel rooms and more. Widely used in places where has much key need to organize or somewhere you need mark the much items.