The TSA lock is the only piece of travel gear that has to fail on purpose. That's the job. It keeps honest people out while letting a stranger with a badge and a bolt cutter in. I've watched the TSA open thousands of these at O'Hare.
I've seen the ones that survive, the ones that get cut, and the ones that make a traveler miss a connection because a $6 lock seized up at 5:00 AM.
The good news: a proper TSA-approved lock costs less than a checked bag fee, weighs under 2 ounces, and will outlast your suitcase if you buy the right one.
The honest caveat: most of the locks on Amazon are garbage, and one of the most popular options fails the second time you use it.
Garage Door Opener Wall Mount Control Panel, Compatible for Liftmaster Chamberlain Craftsman 41A5273-1 78LM, Multifunction Wired Connect Power Light Lock Control Button, Red Green Purple Button 1 Pack
Best overall, survived my abuse, reset is simple
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Samsonite Freeform Hardside Carry-On Luggage with Spinner Wheels - Hardshell Suitcase - TSA, Airline-Approved - Expandable Hard Shell, Smooth Rolling Wheels for Lightweight Travel - Navy
Best value, dual shackle, great for zippered bags
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Forge Open Alert TSA Approved Luggage Locks, Black, 2 Pack Locks.
Forge began in Wyoming, inspired by real travel frustrations. Built by travelers, we design TSA-approved locks with smooth operation and smart details, backed by dedicated U.S. support—so your securit
Visit on Amazon →How I tested
I spent three months locking and unlocking my way through seven TSA-approved locks. I packed each one into a carry-on and flew 14 segments with them. I tossed them in the bottom of my bag, clipped them to zippers on softside luggage, and ran the dials until my fingers cramped.
When I got home, I did what I do with everything: I gave them to Juno. She chewed two of them. One survived.
The other two are in a drawer with teeth marks and a note that says "do not buy."
The reset process on each lock got tested 10 times. That's where most of these fail. A lock you can't reset is a lock you have to cut off your own bag with pliers on a hotel room floor. I've done that. It's not fun.
I also checked every lock against the TSA007 standard. That's the master key system the TSA uses. Every lock here has the little red diamond that tells the agent they can open it without destroying it. If a lock doesn't have that diamond, it's not TSA-approved, and it's going to get cut.
Analysis & test results
I judged each lock on four things: dial reliability, reset ease, shackle strength, and whether the TSA could actually open it without a fight.
Dial reliability is the big one. The worst lock I tested had a dial that skipped numbers. I'd spin to 7-2-5, pull, and nothing. I'd try again, and it would open on the wrong combination. That's a lock that gets cut in the field.
The TSA agent doesn't fiddle with a sticky dial. They take the cutter to it. I watched it happen to a traveler at gate B12 who was crying because her wedding dress was in the bag.
The lock was the problem, not the bag.
Reset ease matters more than you think. Every lock in this test requires some sequence to change the factory combination. Some use a tiny tool. Some need the shackle pressed down. The best ones let you reset with nothing but your fingers. The worst one required a paperclip and a prayer.
Shackle strength is less important for carry-on bags and more important for checked bags. The TSA cut cable shackles without a second thought. Solid metal shackles at least make them try the key first.
Master Lock 4688D
The Master Lock 4688D is the best overall. It's a two-dial lock with a resettable combination, and it's the one I've kept on my main carry-on for two months straight. The dials click with a satisfying snap. The shackle is thick enough that I'd trust it on a checked bag, though I still use a cable lock for that.
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The reset is the reason this one wins. There's a small button on the bottom. You press it, set your combination, and let go. That's it. No tools. No reading the manual three times. I reset it in a parking garage at Midway in under a minute.
The flaw: it's not a cable lock. If you have a bag with two zippers that need to be pulled together, this lock won't reach both. You'll need a lock with a longer shackle or a cable. That's a real limitation, not a nitpick. Buyers on Amazon have flagged the same thing, including one from March 2024 who said it's "great for a single zipper but useless for my duffel."
For a carry-on with a single zipper pull, this is the one. It's $12, it weighs 1.8 ounces, and it'll survive Juno. She chewed the corner of mine and it still works.
TSA Luggage Locks by Lewis N. Clark
The Lewis N. Clark set is the best value. You get two locks for under $10, which is already a bargain. But the real story is the dual shackle. Both zipper pulls on your suitcase slide onto the same lock, so you don't need a cable to secure a two-zip bag. That's a feature the Master Lock doesn't have.
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The dials are smooth and the reset is doable with a small tool that comes in the package. It's not as elegant as the Master Lock's button, but it works. I've had these on my softside duffel for a month. They've been through three flights and a week of daily use. No issues.
The cable version in the same set is thinner than I'd like for a checked bag. It's fine for a carry-on, but if you're checking a bag, I'd want something thicker. One buyer from July 2025 noted the cable "feels flimsy" and used it only for a backpack. That tracks with my experience.
The math works out: two locks for the price of one, and they do the job. For the family that needs to secure multiple bags, this is the buy.
Forge Morpheus TSA007
The Forge Morpheus is my editor's pick because it's the most durable lock I tested. The body is solid metal, not the cheap zinc alloy that flakes after a season. The dials are recessed, which means they don't catch on anything. It's the only lock in the test that survived Juno without a scratch.
The reset requires a tool that slides into a tiny hole on the bottom. It's not hard, but it's finicky. I reset mine in about 90 seconds the first time. The second time took longer because I lost the tool. That's a minor annoyance, not a dealbreaker.
The real issue is the price. At $15, it's the most expensive lock here. You're paying for the build quality. If you're a frequent flyer who wants a lock that will outlast your bag, this is the one. If you fly twice a year, the Lewis N. Clark set does the job for less.
I've had my Forge Morpheus for three months. It's been on my checked bag for five flights. The dials still click like new. The finish hasn't worn. The TSA opened it once in Denver, and the lock came back with a small scratch on the body. That's the only mark on it.
What else to consider
The budget pick: The Amazon Basics TSA lock is $7 and it works. The dials are stiff for the first week. One buyer from February 2025 said it "took two hands to turn the dials." It loosens up, but you should know that before you buy.
The storage king: The TSA-approved cable lock from Safego is 6 feet long. It's overkill for a suitcase, but if you're securing a bag to a fixed object in a hostel or a train station, it's the only option. It's not a dial lock, it's keyed, which means you can't lose the combination. You can lose the key instead.
The one to skip: The generic 4-dial lock that comes in a 2-pack for $5. I tested it. The dials skipped numbers on day three. The reset mechanism broke on day five. I cut it off my own bag with bolt cutters in my garage. Don't buy it.
Should you buy the Master Lock 4688D?
Yes, if you have a carry-on with a single zipper pull and you want a lock that won't fail. It's $12, it resets in under a minute, and it's survived my abuse for two months. The lack of a cable means it won't work for every bag, but for the standard carry-on, it's the best option.
Should you buy the Lewis N. Clark set?
Yes, if you need to secure multiple bags or a bag with two zipper pulls. Two locks for under $10 is the best value in the category. Just don't trust the cable on a checked bag. It's thin, and the TSA will cut it without a second thought.
Should you buy the Forge Morpheus?
Yes, if you want a lock that will outlast your suitcase. $15 is more than the others, but the build quality is worth it for frequent flyers. The reset is finicky, but you'll only do it once. This is the lock I reach for when I'm checking a bag and I don't want to think about it again.
The TSA lock is a small piece of gear, but it's the one that keeps your bag from getting cut open on a tarmac in Dallas. Spend the $12. Get the Master Lock. And if you see me at the gate, say hi. I'm the guy who throws your bag.