Rebuilding a few carbs and I came across the odd size 13/32 for the GAV assembly. removed it with a adjustable wrench, but wanted something better. Snap-on and others made a special wrench for this available on ebay etc., but it is about the only use you would have for it. Took some measurements and found that it is only a few flat file strokes away from being a 10MM. Problem fixed no extra expense. Maybe not for the purists, but works for me...