I believe the GM goodwrench ratchet wrenches to be made by stanley/blackhawk/proto. When I bought mine I googled the warranty address on the back of package and it came up as a GA address for blackhawk/proto. They also look identical, and have the same length(s) as the blackhawk ratcheting wrenches.
However, this was the GM Goodwrench wrenches, they are now GM performance Parts brand. The wrenches come in the same packaging and look the same, but they may be have a different OEM. I believe they are the same and simply changed the name due to GM killing Mr Goodwrench off.
The wrenches themselves are fantastic. I keep them in my junkyard bag and have seriously abused them due to not having the correct tool. Ive done everything from beating them with a hammer, to using them as a hammer and they keep right on working. (fingers crossed). They are so much better then the new china Gearwrench in every way. Fit, finish, strength, length, and quality control.
The BAD: They don't come in as many sizes as Gearwrench, However they do offer a few extra sizes not included in the sets, but they are wicked expensive. They range between $25 and $60 for a single wrench!
If all you want is the 8pc set then they are IMO the best wrenches a person can buy from a local store. BTW: the 8pc flat style goes on sale all the time for $29.99
