A TSA lock is a special type of lock commonly used to secure luggage. It was developed in response to tightened security measures in international travel (mainly to and from the USA). American security authorities can open it with a master key. Therefore, in addition to the combination lock used by the customer, there is also a key lock. As a result, in most cases, no key is included directly with the product (exception: if there is a second key lock alongside the TSA key lock).