I've added a board making it "L" shaped to move the work piece off the edge of the bench but the principle remains the same. It gives an easy way to clamp the work piece on the bench top over the leg.
The appliance/jig in the vise:
Holding the work piece:
Like many of the most useful bench appliances, simple, easy to make and is used almost every shop day. It and my bench hooks live next to each other within easy reach under the bench.