Some consider this to be the ultimate vice. It's large, can be rotated around its horizontal and vertical axis and clamped into place in pretty much any orientation in 3D space. It has metalworking jaws on the underside which come topside if the vice is spun around. It has four dogs in the jaws that can be exposed for holding irregular shapes. The jaws can be veered +/-5 degrees away from paralle to hold tapered pieces. A secondary pivoted plattern can be fitted between the jaws which allows more extreme tapers to be held.
The one in the picture is an eastern copy. Its heavy, and the table its attached to here is probably too small for it, so a metal chassis had to be welded together to provide support under the table top.
It is an extraordinary piece of equipment, and works very well indeed.