Accepts any 10-32 threaded knob to match your interior. Photos with knobs are shown for example only. Knobs are priced separately. With all of the modern electronic devices that you need to charge, what's missing from the average street rod??? A Power Port, of course! And StreetWorks gives you one that is not only attractive but also can be made to match the rest of your interior. Our Power Port with Billet Plug features an easily installed Power Port (fits into a 7/8" diameter hole), wiring terminals, an attractive, machined Billet Plug with O-ring retainer, a spare o-ring and a 10-32 threaded stud for attaching the decorative knob of your choice (sold separately).