Should I buy a TSA-approved lock or a non-TSA lock for travel?

If you fly through the United States, a TSA-accepted lock lets screeners open and re-lock your bag without cutting it off. A true non-TSA lock offers no master-key backdoor, which some travelers prefer for privacy, but screeners may cut it. Most of the high-volume locks in this pool are TSA-accepted, so read the listing carefully if you specifically want a non-TSA model.