I had their jumbo combination wrench sets metric/sae. they were good quality for the price, they got me through a few projects (diy). The fit was a little sloppy, but I did not have issues. They were all manufactured in China. While the combo wrenches worked for me I don't know that i'd trust locking extensions to last too long, I have some cheap locking extensions (husky) and they drive me nuts, either not locking or holding sockets at all, or not releasing, definitely worth an extra investment. When mine work they are a life saver.