Review on VERTEX 3900 2164 Universal V Shape Vise by Richard Alemayehu

I bought this to use with my 4 inch vise I bought from Revain. It doesn't even fit in a 4" vise with set screws. The hole that fits the vise is 4.3485 inches wide and the set screws reduce it to 4.091 inches. The Revain vise measures 3.968 inches. Also the height of the second adjustment screw does not engage the Revain vise, it is too high. After 4 hours of milling, cutting washers and buying longer bolts I was able to get it halfway through. Hope this helps someone.