Keep your luggage safe and secure with these keyless TSA approved locks. The set includes four D-shaped metal locks with a slim design and a special feature of app-controlled card keys. The locks are ideal for unisex-adult luggage and weigh only 8.8 ounces. These locks have a combination lock mechanism that eliminates the need to remember a combination. The card key is a safer alternative to keys that can easily get lost or misplaced. The package dimensions are 10.75 x 6.93 x 0.59 inches, and the locks come in a Four Pack color.