That's right. All locks with a keyhole are so-called TSA locks. You can lock it with a combination of digits. When you fly to the U.S., you must comply with the requirements of the U.S. Customs and Security Authorities, which state that they must be able to open your suitcase to check the contents. Therefore, when your suitcase is locked with a regular lock, the security officers may break open your suitcase during his/her check. With a TSA lock, you do not run any risks, as these locks can be opened by security officers with a master key. Of course, this procedure is carried out only when there is a severe reason for opening your suitcase.