I have 2 pairs of Sunnex 1/2" drive impact socket sets. They are well over 25 years old & they were made in Japan. I didn't think they would hold-up very long, I was wrong. I used them to remove lug nuts from Peterbuilt trucks & never broke one. Stlll have them & use them to this day. They probably sold out to a Chinese company & I doubt the quality is near as good.