If you need to add a compact panel-mount connection but don't have the time or ability to cut a custom oval or square hole, this USB Micro B Small Round Panel Mount Extension Cable is the easiest and fastest way to panel-ify your project. The adapter can fit holes 12mm to 18mm, so you can drill in your wood, plastic, or metal with a common hole-saw or bit, no special shapes or filing required. Un-screw the plastic nut, insert the plug and re-attach. Ta-da! Now you have a USB micro B jack and plug for connecting any cable.