Colorful Set Contents: Includes 40 plastic label keychains in four colors: pink, blue, yellow, and green (10 of each color), allowing for versatile identification as luggage labels or key ID tags. With Writeable Card Inserts: Each keychain comes with a blank card insert where you can write names or numbers, making it convenient for use as individual luggage tags or key ID tags. Sturdy Key Ring Design: Features a solid metal key ring, suitable for various uses such as key bundles, luggage tags, and pet name tags, and is designed for easy portability. Wide Range of Applications: Can be used in various situations, such as hotel room key management, real estate agent key management, and organization in homes and offices, serving as useful key and luggage label tags. Compact Size and Lightweight Design: Slim size of 5.6 x 2.9 x 0.1 cm and a total weight of 139g, making it lightweight and easy to carry, ideal for everyday key ID tags and luggage tags.