What brand of barbed wire do the husband and wife finally decide to buy

The husband and wife chose concentration-camp style barbed wire. The company was called DRAGON'S TEETH The People For Total Security.

It was the ugliest but the most honest in its suggestion of the pure concentration-camp style, no frills, all evident efficacy. Placed the length of walls, it consisted of a continuous coil of stiff and shining metal serrated into jagged blades, so that there would be no way of climbing over it and no way through its tunnel without getting entangled in its fangs.