I bought this vise to use on a router table that I added to my drill press. A milling vise would be overkill, but I still needed something with the base parallel to the top of the vise. otherwise it would be very difficult to set it up for fairly accurate work. You can't go wrong with these vices. The information in the specs leaves a lot to be desired, but that's my only criticism. I purchased the 6" version of the vise and have uploaded a drawing showing approximate dimensions of the base in case this info can help anyone. 8 inches thick. I will add more photos once I have completed my modifications to the drill press.