Fork Disassembly Tool

The bolt at the bottom of the fork can usually be removed with a quick snap of the wrench if the fork is fully assembled.  A little compression can help.  Don't lose the fiber washer.

If you must have the special tool to hold from the inside, this is an option:

Joe McDonald wrote: The 3/8 Gator Socket just arrived from ebay, $12.88 - free shipping. Nice snug fit down the H2 inner fork tube to hold the cylinder fork and good for other stuff you least expect. Fits 7-19mm.