The TSA Indicatorâ„¢ 3-Dial Combination Lock by Lewis -n- Clark has a unique status-changing lock that alerts travelers if their lock has been opened by the TSA. If you luggage has been opened, the status window changes from green to red. This 3-dial resettable combination lock is accepted and recognized by the TSA (Transportation Security Administration), which means your bags can be opened and searched with damaging the bag or the lock. A special mechanism enforces re-locking after inspection because the TSA tool cannot be removed from lock body until re-secured.