Reply #28: I don't know. They have this little symbol on the front [View All]

and it changes colours if it's opened by TSA -- again, supposedly. I've never seen the lock change colour after I get it from baggage return, and I've never had the little sticker on my baggage saying it was checked/opened, so who knows--they could be rifling through my shit the entire trip and I wouldn't know about it

Here are some:

http://www.thesavvytraveller.com/tools/travel_sentry/1home.htm

TRAVEL SENTRY locks are combination locks that Transportation Security Administration (TSA) agents can open without damaging or disabling them.
Here's how it works:


1. Travel Sentry™ Certified luggage locks have a special identification mark alerting the TSA that they can open this lock without destroying it.
2. The luggage locks have a special code, which is used by the TSA.
3. Each TSA screening location uses the code to override (open) the lock and then relock it after inspection.

If a security agent does open your luggage a note will be placed inside to let you know.

For more information
SearchAlert TRAVEL SENTRY luggage locks also show you if the locks have been opened by a TSA key. These locks might help you prove a claim for damaged/stolen items.
Here's how it works:


1. When the TSA override device is used, the Security Window changes from green to red.
2. The Security Window also changes color from green to red if a counterfeit override device is used to open the lock.

Since a TSA agent is required to leave a TSA Notice of Inspection in opened bags, you will know if your bag was opened by a TSA agent or by someone with a counterfeit device. If the SearchAlert lock Security Window shows red and no official notice of inspection is found, travellers should take the luggage to a TSA security person to determine if anything is missing or if anything has been added to the luggage.




The red diamond clearly shows the TSA that they have approved this lock and can open it with a special key if they need to. If the lock is opened, the indicator changes from green to red so you know.



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They are pretty much the only luggage locks we could find anymore when we went to buy some a few years ago to replace the decrepit, any-key-can-open-them locks we had previously