The Griffin Effects Voltage Converter converts a positive ground/PNP pedal like a germanium Fuzz Face, Tonebender, etc. to negative ground allowing you to power it with any negative ground power supply. You will be able to daisy chain it with all your negative ground pedals. You will no longer need a dedicated power supply. If your pedal doesn't have a DC jack, this is a great option to add one.
The Voltage Converter allows for center negative DC wall wart power supply.
The converter comes with a DC jack and the PCB mounts directly on the circuit board. If your pedal already has a DC jack and don't want to use the included one, there are pads to hook up to your existing DC jack.