I haven't yet added the piece of thick wooden dowelling which will operate my version of a wagon vice set into the surface on the right. The clamping will be done by closing the metal end vice on the dowel, which will push the slider along. I don't yet know how effective it will be.
The picture below shows the leg vice, at the other end of the bench, in operation:
The piece of wood at the bottom, the one with all the holes in it, is used to make sure that the vice jaw (I believe this is called the "chop") stays parallel with the leg. It's usually best to set the chop so that it tapers in slightly towards the top, as this gives a firmer grip.
The main advantage of a vice like this over a conventional metal one are that the clamping area is potentially much larger, and the workpiece as a result is held very firmly indeed. With a metal vice, the added wooden jaws to protect the work are usually slightly tapered from top to bottom: but as they wear, they have to be replaced with newly made ones. With the leg vice, the angle of tilt can be chosen for each piece of work.
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