Apple has started to roll out new Dock Connectors for its iPhone, iPad, and iPod displays that double as security locks, according to a new report. Citing a reader report that was subsequently confirmed by a number of Apple Store locations, AppleInsider reports that the cable may be in short supply, as not every device has one—they are primarily being used for third-generation iPads and products near the stores’ entrances—and not all stores have started to use them. The cable itself is very similar in appearance to a standard Dock Connector cable, only with a lock icon on the top, and new internals that prevent the unit from disengaging.