I just found mine, the only one I have in this line, it's a flat beastie in size 25/32 x 7/8... or 20mm x 22mm if I really want to round off the axle nuts on my Honda motorcycle. Funny thing is, mine doesn't say Hy-Bar on it, no makers marks at all, until this thread was started and I could see pics of what other folks have I never knew who made this wrench.
