I don't know much about it but it has 5 " jaws and is very large and heavy. It kind of looks like some of the Japanese ones I have seen but I don't think it is. It doesn't say Japan on the bottom. Also I had to fab up a new center bushing for the rotating part and the threads it the main casting were 1/2 NC. I like it a lot and mounted it on my welding table. Just curious if anyone knows anything about it like who made it, where was it made ect.