really do not think so, but cannot find ANY info on the net. Every time I am trying to avoid union made ****** products and look it up, it never shows. My next step is usually to contact the company via email and request-kindly and professional- an answer. Since al-gore ""invented"" the Internet, I remember only getting ONE answer, and the guy was at least honest (Rhino Tire Gauges). Will ALWAYS try to avoid china and union made products, often NOT possible. But I'd rather give my money to Harbor freight than ANY union plant. Period. Had NO use for them in Germany (where they are at least reasonable), and certainly do not like these criminals here in the US. And I do understand that at one time they were needed, nowadays it's only racketeering.