Purchasers of the ¥780 (£3.70) device get to set whatever combination they require on the three-dial lock and then clip that onto any male USB jack to prevent anyone else from using it.
Lock up your cables
Thanko's suggestions include locking up a USB drive, preventing access to a mouse, a cable and even a USB microscope.
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Quite what's to stop ne'er-do-wells just pocketing the whole lot is anyone's guess, but then again we're not privy to the obviously suspicious goings on chez Thanko.