Unfortunately I am no longer making the tools and do not have any remaining.
To service most of the USD/Voit DH regs you need some way of holding the body of the reg, something to remove the body ring with, something to remove the nozzle with and something to help assemble the nozzle with. A BIG adjustable wrench can usually get to the nozzle but the rest of the tools are difficult to substitute for and without the right tools, esp if the ring and/or nozzle are stuck, it can be very challenging to get them apart without damaging the parts. The tools are also really helpful to reassemble the reg as well. The job can be done without them if you are creative but if you have one that is not in good shape....corroded together as many are.. they can be quite difficult to get apart without damaging something and keep in mind, there are very few to no replacement parts available (body parts, service parts are still around for now) .