Best TSA Luggage Lock: 4 Options Compared
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Looking for the best TSA luggage lock when your suitcase zipper pulls barely line up? Start with the opening the shackle needs to pass through. These four options cover flexible shackles, four dials, shared keys and a longer cable.
Quick answer
Checked on 19 October 2026. Choose the Master Lock 4688D for a flexible braided shackle or the 4696D if you prefer four dials and have room for its thicker shackle. The 4689T gives you two locks with one key, while the Pacsafe Prosafe 800 offers a cable for bulky pulls or a backpack strap.
All 4 picks at a glance
Master Lock 4696D TSA Lock
A four-dial combination with an extended reach shackle. Read more
Master Lock 4689T TSA Locks (2 Pack)
A keyed-alike pair for travellers who prefer carrying a key. Read more
Pacsafe Prosafe 800 Cable Lock
A longer cable for bulky zipper pulls or a backpack strap. Read more
How we compared them
The NomadsToolsLab team read the TSA, Travel Sentry, Master Lock and Pacsafe pages on 19 October 2026. The team also checked all four Amazon US listings with a US address. The TSA guidance cited here was published in 2014.
What a TSA Lock Does and Does Not Do
TSA guidance published in 2014 says a locked checked bag may need its lock cut if TSA cannot open it another way. It says packaging shows whether TSA can open the lock, and recognised locks open with master keys that the lock makers supply to TSA. TSA also states that it is not liable for damage to locked bags opened for screening.
Travel Sentry says its accepted locks carry the Red Diamond logo. A code on each lock tells security which tool opens it, while locks without the logo may be cut. Travel Sentry sells the licence for this system.
A luggage lock can help keep a zipper closed against casual opening, but it is no guarantee against theft. Keep valuables in your carry-on. In 2016, CSO Online reported that hackers published a 3D-printable model of a Safe Skies TSA master key.
The four side by side
| Lock | Unlock | Shackle (maker) | Body width (maker) | TSA wording (maker) |
|---|---|---|---|---|
| Master Lock 4688D | Unlock: 3-digit, set your own | Shackle (maker): Flexible braided steel, 38 mm long, 3 mm thick | Body width (maker): 30 mm | TSA wording (maker): Recognized as TSA-approved in 29 countries |
| Master Lock 4696D | Unlock: 4 dials, 10,000 combinations | Shackle (maker): Extended reach, 48 mm long, 6 mm thick | Body width (maker): 35 mm | TSA wording (maker): TSA-approved in 29 countries |
| Master Lock 4689T (2 pack) | Unlock: Key, keyed alike | Shackle (maker): Shrouded, 14 mm long, 3 mm thick | Body width (maker): 25 mm | TSA wording (maker): Lets screeners inspect and relock without damage |
| Pacsafe Prosafe 800 | Unlock: 3-dial, resettable | Shackle (maker): 10 cm stainless steel cable | Body width (maker): Not listed | TSA wording (maker): Travel Sentry Approved (Pacsafe's wording) |
Figures from the makers' pages, read on 19 October 2026: Master Lock 4688D, 4696D, 4689T and Pacsafe. Rules from the TSA blog (2014), Travel Sentry and CSO Online.
Master Lock 4688D for Small Zipper Pulls
Master Lock 4688D TSA Lock
The Master Lock 4688D uses a flexible braided steel shackle. That flexibility can help where a rigid shackle is awkward to position.
You set your own three-digit combination, so this is a choice for someone who prefers a code. It has three dials rather than the four on the 4696D. Check the zipper openings before choosing, even with its thinner shackle.
Master Lock 4696D for a Four-Dial Combination
Master Lock 4696D TSA Lock
The Master Lock 4696D offers four dials and 10,000 combinations. It suits someone who wants that combination format and an extended reach shackle.
The shackle is 6 mm thick. Measure the openings in both zipper pulls to see whether it will pass through.
Master Lock 4689T for Two Locks With One Key
Master Lock 4689T TSA Locks (2 Pack)
The Master Lock 4689T comes as two keyed-alike locks. One key operates both, so you do not need separate combinations for the pair.
The design has a front-access keyway and a shrouded shackle. Its short shackle gives you less reach than the other options here, so check how your zipper pulls meet. You also need to keep the key accessible.
Pacsafe Prosafe 800 for More Cable Reach
Pacsafe Prosafe 800 Cable Lock
The Pacsafe Prosafe 800 has a 10 cm stainless steel cable. That gives you a way to thread the lock through bulky zipper pulls or around a backpack strap.
It uses a resettable three-dial combination, and Pacsafe says it carries Travel Sentry approval. Check the cable arrangement against the pulls or strap you want to thread it through.
Choose by Zipper Fit and How You Unlock
Check the zipper openings and the distance between the pulls first. Then decide whether you want to remember a combination or carry a key. Those checks help you choose a lock that fits the bag and your routine.
These four choices are for checked suitcases and backpacks. Keep valuables in your carry-on whichever luggage lock you choose. For hostel lockers, see our hostel padlock guide, and for the rest of the bag our packing cubes comparison.
- Match the shackle thickness and reach to your zipper pulls before choosing a lock.
- The 4688D, 4696D and Prosafe 800 use combinations. The 4689T pair uses one shared key.
- The 4696D has a 6 mm shackle, while the 4688D uses a thinner, flexible braided shackle.
- The Prosafe 800 has a 10 cm cable. The 4689T has a short shackle, so the distance between your zipper pulls matters.
FAQ
What does TSA-accepted mean on a luggage lock?
TSA's 2014 guidance says recognised locks can be opened with master keys that the lock makers supply to TSA. Travel Sentry identifies its accepted locks with a Red Diamond logo and a code that tells security which tool to use.
Can TSA still cut a luggage lock?
Yes. TSA's 2014 guidance says a lock may have to be cut if TSA cannot open a locked checked bag another way. It also states that TSA is not liable for damage to locked bags opened for screening.
Which of these locks has a flexible shackle?
The Master Lock 4688D has a flexible braided steel shackle that can bend where a rigid shackle will not. Check your bag's openings before choosing it.
Does a TSA luggage lock protect valuables?
TSA acceptance concerns screening access. For the limits of luggage locks and advice on valuables, see “What a TSA Lock Does and Does Not Do” above.
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