Jet adjusting wrench

Hey folks:

Not a big deal, but...

Maybe I have a carb with an unusual size jet nut, but the "official" SU Jet
adjustment wrench doesn't fit.  It's too small.  Should I have known better?
Is this wrench supposed to fit some other SUs?

Does SU make any of their doo-dads in the third world?  The wrench is marked
SU   386-400.

Just curious.  I paid $2.00 for the whole tool set.  Maybe I'll put 'em out
on eBay

Regards,

Charles
'74 Midget
'68 Sprite
cdsorkin@ix.netcom.com
Bloomfield, NJ