Vise Grip's!!
Some of the Vise Grips brand I have say Irwin on them but still say made in the USA. These are still good quality ones, so be carful when buying used.
The Mac ones I have, a few of them say made in the US, and the others don't say where they are made. I guess I have to assume they are made in china.
I also agree cutters and locking pliers by Knipex, are very good quality.