Cornwell: hard line is US made (wrenches, ratchets sockets, punches, etc) ~ not sure on the rest of their line
Snap-On: US made for most of their items (blue point is import), check their website for country of origin
Williams: some US (some wrenches and sockets) some china
SK: US made
Wright Tool: US made with US steel
Mac: Hard line tools made in USA
Matco & Armstrong: considering they are owned by Danaher and they supply Sears, who know how long they will still be US made
Proto: still USA made or so they tell us (stanley got in trouble with them about 10 or so years ago with the "made in usa")
Vise-grips: CHINA
Ridged: I believe most is still US
Channel locks: Most is US
Klein: USA
Thomas and Betts: USA
Pratt Read: USA (also PR stamped on craftsman screwdrivers)
And there are many other US made. If in doubt e-mail or call the company. If US-made; most if not all, will would be happy to tell you where their product is made.
Remember some items the tool truck sell might not be made by them, example: grease guns, screwdrivers, pullers (some sell OTC tools), DMM (fluke is now china made), etc
Harry Epstein and ebay are good places for US-made tools
bob