Lewis N. Clark Travel Sentry Indicator Heavy-Duty Cable Lock - Did you know you can lock your luggage while you're traveling through the airport? While the Transportation Security Administration (TSA) electronically scans bags, sometimes they also need to physically inspect a piece of luggage. In these cases, the TSA logo on special locks such as the TSA83 alerts inspectors that they can use their master keys to unlock the luggage without cutting the lock or damaging the bag.