TSA lock

A TSA lock, sometimes called a TSA-approved lock, is a luggage lock built with a special keyhole that airport security officers in the United States can open using a standardized master key, then relock, without needing to cut or break the lock. Ordinary padlocks without this feature can legally be cut off if security needs to inspect a bag, since regular locks cannot be opened without a key or combination the traveler holds.

For one-bag travelers, a TSA lock is most useful for securing a bag left in a hostel locker, a hotel room, or on a train, rather than as protection against a determined thief, since most travel locks are relatively easy to defeat with basic tools. Its main value is deterring casual opportunistic theft and keeping a zipper from accidentally opening in transit.

When buying one, look for the printed TSA logo or symbol confirming it is a recognized master-keyed lock, since locks without it can still be cut off during a security inspection. A common mistake is relying on a single small lock as the only security for valuables, when a lock works better paired with packing valuables in a less obvious spot or choosing an anti-theft bag design.