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Tells you afterwards whether the bag was opened

SURE LOCK Open-alert cable lock, 2-pack

A cable lock that records the inspection: a red indicator appears if the lock has been opened by a screener, and stays visible until you unlock it yourself.

SURE LOCK TSA cable lock showing its red open-alert indicator

SURE LOCK Open-alert cable lock, 2-pack

A cable lock that records the inspection: a red indicator appears if the lock has been opened by a screener, and stays visible until you unlock it yourself.

Amazon reference
B073NYB7R2
EAN
0646648185114
  • An open-alert indicator that shows a red button once a screener has opened the lock, and stays shown until you unlock it
  • A braided steel cable, which threads zip holes and awkward bags a rigid shackle cannot
  • Does not mention the red-diamond TSA marking

Best for: Knowing whether a bag was opened in transit, rather than guessing from a paper slip

≈ $12
Check price on Amazon

Specifications

Amazon reference
B073NYB7R2
EAN
0646648185114

Most locks on this shelf do one job: they keep a zip shut and let a screener open it without cutting. This one adds a second — it tells you afterwards. A red indicator button appears once the lock has been opened with a master key and stays visible until you unlock it with your own code, which means a bag that was inspected says so even if the paper slip is missing.

That is worth more than it sounds. The question after a long flight is not usually whether a lock survived; it is whether anything happened to the contents, and knowing whether the bag was opened at all is where that inquiry starts. The listing describes the mechanism precisely and does not overclaim it.

The rest is a competent cable lock: braided steel that threads zip holes and awkward bags where a rigid shackle will not go, a resettable three-digit code that screeners can neither see nor change, a zinc alloy body, and oversized white numerals on matte black dials — a legibility decision that no other listing here bothers to make and that matters at a check-in desk at dawn. What is entirely absent is measurement: no cable length, no cable diameter, no body size, on a shelf where this hub compares cable locks against shackle locks and cable length is the deciding figure. And like every American listing here, it says “TSA approved” without confirming the red-diamond marking.

Availability

Read on the day this page was built: $13 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.

What travelers ask

What does an open-alert indicator actually tell you?

That the lock was opened with a master key, and nothing more. The listing describes it exactly: a visible red alert button appears when the lock has been opened by a screener and "remains visible until unlocked with your personal combination". That is genuinely useful — an inspection slip in the bag can be missed or omitted, and knowing the bag was opened tells you where to start if something is missing. What it cannot tell you is what happened while it was open.

Why are big dials worth mentioning?

Because of where these are used. A three-digit code is set and read at a check-in desk, in a corridor, at four in the morning or on a dark coach, often by someone who has taken their reading glasses off. Oversized white numerals on matte black is a legibility decision rather than a security one, and on this shelf only this listing makes it.

What is missing from the page?

Every dimension. There is no cable length, no cable diameter and no body size — and this hub’s third comparison is cable locks against shackle locks, where cable length is the figure that decides what a cable lock can reach around. The ZHEGE lock on this shelf publishes 26 inches; the Master Lock publishes a 38 mm (1.50 in) shackle. Here the cable is described as braided steel that "easily fits zipper holes" and never measured.

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    Amazon reference
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    EAN
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    Amazon reference
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    EAN
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