never heard of sk? *GASP*
i honestly believe they're snapon quality tools, usually for craftsman prices. whoever their marketing people are... kinda suck. they sell like 1/10th of the line at sears (special order). the rest you have to buy from random online retailers, or ebay, or have your tool truck order them for you (snap on has been more than glad to order me SK tools).. check amazon.com too, sometimes they have rediculously priced clearance sets. i just got a 10pc impact swivel set for 55 shipped, matco wanted 320 for theirs
on sale. the sk swivels are higher quality too.
the box im looking at is 56x30, standard professional size.