Each lock comes one in a pack with ABS housing. Steel shackle. 2 keys included. The Locks are using Travel Sentry® Approved technology allows your luggage to be unlocked and inspected by security authorities without damage. How this works is each lock has a special code, which is used by the TSA and other security agencies to know which tool to use to open the lock. Every security screening location at all US, Canadian and now many other international airports are able to open the lock and then safely relock it after inspection. You will be protected with one of these tiny but colourful locks.