The jaws are 20 inches wide about 5 1/2 inches tall and front jaw is 2 1/4 thick white oak. And i also thought it would be hard to keep even pressure when I was building it but i figured it was better than what i had been using. Much to my surprise it worked very well and I can clamp something with moderate pressure on just one side of the jaw without the jaw racking because of the wood runners I added, if I have to really crank down hard on something then I'll add a scrap of similar thickness on other side but that is only when I really need to crank down. When I do add a scrap tho it doesn't take much to put some real pressure on it. The vise really shines tho while clamping something that fits in between the clamps all you have to do is adjust one side to be just barely clamping then all that is required to hold piece is just maybe a quarter or half a turn of one clamp and piece is basically unmovable much better holding power than any single screw vise I've used. I just watched an episode of the woods rights shop after building this and he had Chris Schwartz on as a guest and Chris brought with him a twin screw removable vise that works same as what I built and Chris shows all the benifits of a twin screw vise opposed to a single screw. I'm totally impressed with the holding power of this style vise. I'd love to claim that I knew it would work well and everything but I really didn't like I said earlier I was pleasantly surprised with the results, I just had an idea to solve a problem that I had and thought it would just be better than what I was using but turned out bring very useful. Some planning on my part but mostly luck lol
Last edited by the dude; 05-19-2015 at 06:55 AM.