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Sea to Summit says:
The Combo Cable TSA Lock adds versatility for oversize zips or unusual closures and/or keeping several bags together.
With airport security increasing, we want you to arrive at your destination with your luggage locked and secure. Avoid having your padlocks cut off or worse, your zip sliders cut off by using our padlocks which are Travel Sentry® approved and feature the Red Diamond, alerting the TSA and other airport security agencies that they can open these locks without destroying them.