Why do some USB connectors have those 2 square holes?

November 15, 2026 at 04:45 PM

Some USB connectors, including USB-A, feature two small holes that have an important purpose. Other USB connectors lack these holes for a reason, too.

Some USB connectors, including USB-A, feature two small holes that have an important purpose. Other USB connectors lack these holes for a reason, too.<p><img src="https://www.engadget.com/img/gallery/why-do-some-usb-connectors-have-those-2-square-holes/intro-1794332715.jpg" /></p>

Why do some USB connectors have those 2 square holes?

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