Badly designed
Here are my reasons
The front 2 bolt holes are directly underneath the rear face of the vice so when you come to bolt the vice to the bench you can't have the rear face in line with the edge of the bench. 1 the bolt holes miss the bench and 2 they are in the way of the rear face! You could situate the bolt holes two on left and one on right but the pressure of the vice would be wrong. All this can be seen in the pictures of the vice if you look carefully you can see the front bolt holes directly underneath the rear jaw.