And I have to apologize to Uncle Buck. When last I posted a pair of my long VACO nutdrivers, UB said he liked those and would have to start watching for a set. I said I didn't think they came any larger than the 1/4" and 5/16" that I had - at least I'd never seen long ones in larger sizes.
Well, today I found a 7/16" and this 1/2". The 7/16" had been modified - the cup on the end was ground down so thin it had cracks at each of the hex corners. So I left it. But I did remember the number (S-146). This 1/2" is pristine, a number S-166. So, UB, I was wrong - there is another set for you to hunt for!