All of the newer Irwin/Hanson taps and dies I have seen lately are Chinese imports. They may or may not be any good. I do not have any, and use old stuff like GTD, Card, Union, Morse, Brubaker, Threadit, Threadwell, Vermont, and other old American tools, bought for a song. Some of the imports may well be OK, but for me it is not worth the cost and the drive or shipping to find out when excellent NOS USA stuff is still available dirt cheap...
Don't wait until you need it to buy it...