There is a barbed wire and a razor-wire. The barbed wire is
a waste of money. It is made of iron and usually stretched
out and put on a wall with intermittent "L" bars. Two snips
and that wire, already in tension, flies apart.
The razor-wire is a steel wire. It has razor-sharp twin pro-
jections along the wire, that can cause serious damage. It
is usually left in tight rolls on top of a barrier. Unlike iron, if
cut it retains its shape.
The barbed wire is a deterrent for an intruder trying to leave.
The razor-wire is a deterrent from even thinking about coming
inside. Of course, the razor-wire is more expensive. But I have
seen folks using three tier barbed wire, coupled with a razor-
wire. Only the A-Team would thinking about getting into that
Sheikh 'Police Ka Hai Farz, Madad Aap Kee...' Chilli