I bought a 3 inch vise. In general everything is fine. A few things to mention, the most important being that this is not a 4 inch sine. When measured, mine is 4.005 between centers. The fixed jaw is about 0.0015 higher than the movable jaw, and finally the movable jaw has a slight taper. All other measured values were within the acceptable range. So not a bad device for the money. Just make sure you know what wheelbase is