Why are you getting it off in the first place?
If it's worn and out of ideas, use a hammer and punch/screwdriver/chisel on the "two hole thing" CLOCKWISE to loosen and remove it, remove the cluster of cogs (a lot of small balls will pop off), remove the pawls (slide them off axially, they will have some springs too), and put a large crescent wrench/channel locks on the pawl holders (IT WILL DESTROY THE FW BODY) and give it a twist with any hammer/extender/hammer-extender/bench vice and it must come off.